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    5.1.23

    Bug fixes
     *  [ES] removed *86 specific optimizations (rep. #2154)
     *  [ES] renamed RMS per cent error -> relative error (rep. #2192)
     *  [ES] a workaround for a bug in recent Xorg not releasing grab of popup menus
     *  [ES] accept -graphtype chart instead of bar. List possible values in the
             help output
     *  [TK] fix building against png-1.5
     *  [SM] a grace_np fix
     *  [ES] IsoLatin5.enc was not included in the distribution

    5.1.22

    Interface
     *  [DC] mention object type when asking for user's confirmation on delete

    Parser
     *  [ES] added "LINCONV(set1, set2)" command - an equivalent of
             Transformations->Linear convolution
     *  [ES] added "VOIGT(gamma, sigma, x)" function (rep. #2144)

    Bug fixes
     *  [ES] in the grace_np library GraceClose() could kill all user processes
             if by that time the Grace subprocess has exited (rep. #2035)
     *  [ES] certain hand-modified settings in project files might cause the GUI
             crash (incl. rep. #2139)
     *  [ES] ungraceful closing of anonymous pipes could result in high CPU load

    5.1.21

    Functionality
     *  [ES] added IsoLatin5 (ISO 8859-9) encoding file
     *  [ES] now honor locale in number stringifications (rep. #2109)
     *  [ES] extended range of prefixes in the Engineering format up to 10^{+/-24}
     *  [HR] added "Computing" tick label format

    Interface
     *  [ES] added "-maxpath" command line option for setting maximal drawing
             path length
     *  [ES] allow for longer legend lines

    Parser
     *  [ES] added "KILL BLOCK" command (deallocates the memory of the current
             block data)

    Bug fixes
     *  [ES] there was a misleading error message when attempting to redefine an
             existing variable/keyword in the parser
     *  [ES] fixed rounding-off problem with zero labels (rep. #2098)

    Portability/Compilation
     *  [IG] eliminated some of gcc-4.1 warnings (rep. #2111)
     *  [IG] man page cleaned (rep. #2110)

    5.1.20

    Parser
     *  [ES] added SGN() function

    Defaults
     *  [ES] changed default major tick spacings to 0.2

    Bug fixes
     *  [ES] command argument "-graphtype pie" wasn't recognized (rep. #2058)
     *  [ES] fixed openning of help documents when using an external browser
     *  [ES] "Geometric transforms" with order: "Rotate, scale, translate" in fact
             was doing "Translate, scale, rotate"
     *  [ES] Grace might crash when using "Engineering" tick label format
             (rep. #2094)
     *  [ES] file selection dialog wasn't closed when fit parameters file was
             read in successfully

    5.1.19

    Functionality
     *  [ES] BARDY and BARDYDY sets are now allowed in XY graphs

    Bug fixes
     *  [RL] loading a DL module could fail with an irrelevant error message
             (rep. #2071)
     *  [ES] a bug in the PS driver caused CUPS to output empty page if printing
             accounting was enabled in foomatic (rep. #2047)
     *  [ES] automatic data point purging (enabled when set length exceeds "Max
    	 drawing path length" in Edit/Preferences) could fail silently
             (rep. #2069)
     *  [ES] the point purging could result in wrong set filling when fill to
             the baseline was selected
     *  [ES] configure's option --with-helpviewer was broken (rep. #1414)

    5.1.18

    Parser
     *  [ES] implemented concatenation of quoted strings and numerical expressions

    Bug fixes
     *  [ES] some X font configurations could make Grace crash (rep. #1436)
     *  [ES] DEFAULT ... commands had no effect on new drawing objects (including
             rep. #1437)
     *  [ES] DEFAULT CHAR SIZE had no effect on tick labels of new axes

    5.1.17

    Drivers
     *  [ES] changed default resolution of the PDF driver to 300 dpi

    Documentation/Info
     *  [ES] minor documentation updates, including rep. #1421

    Bug fixes
     *  [ES] with page fill disabled, the page frame line might be drawn with
             wrong properties
     *  [ES] due to a bug in the Xbae widget, when a TrueType font was used,
             several dialogs could become unusable (including rep. #1366)
     *  [ES] enabling patterned fills and PDF-1.4 compatibility mode could result
             in crash when printing to PDF

    5.1.16

    Interface
     *  [ES] set scrolling of the custom ticks/labels table to 1 row per
             click (rep. #1419)

    Documentation/Info
     *  [ES] updates relevant to the status of mailing lists/forums

    Portability/Compilation
     *  [ES] PDF driver updated to work with PDFlib-6 (rep. #1426). Minimal
             supported version is now 5.0

    Drivers
     *  [ES] added option to generate PDF-1.4 format (Acrobat5). Support for
             PDF-1.2 (Acrobat3) removed

    Bug fixes
     *  [ES] replaced meaningless error message issued when trying to load data
             with a few string columns as a single set
     *  [ES] in the spreadsheet editor, the last entered cell's data wasn't
             committed (rep. #1420)

    5.1.15

    Functionality
     *  [ES] increased max number of custom tick marks/labels to 256 per a
             popular demand

    Project files
     *  [ES] now using one-line format for saving graph's world and viewport
             settings

    Defaults
     *  [ES] changed default external help viewer to mozilla

    Documentation/Info
     *  [ES] misc documentation updates (including rep. #1411)

    Bug fixes
     *  [ES] fixed crash when number of custom tick marks/labels exceeded 100
     *  [ES] fixed evaluation of FWHM in "Feature extraction" (old version
             might produce wrong results for multi-peak data)
     *  [ES] support for loadable functions of 4 and 5 parameters, introduced
             in 5.1.14, was incomplete
     *  [ES] in correlation/covariance, only the absolute value at 0 is
             normalized to 1, so for anti-correlation the sign is preserved

    5.1.14

    Interface
     *  [ES] use multiplication sign in formulae of regression report (rep.
             #1360)

    Parser
     *  [ES] allow for DL modules to define functions of 4 and 5 parameters
             (rep. #1343)

    Portability/Compilation
     *  [ES] fixed compilation under FreeBSD-5.1 and OS/X (rep. #1371)

    Bug fixes
     *  [ES] on 64-bit platforms, when specific compiler/optimization
             combinations were used, some dialogs could crash randomly
             (e.g. rep. #1310)
     *  [ES] on 64-bit platforms, when specific compiler/optimization
             combinations were used, X run-time warnings could be issued
             about unrecognized XKeySym's
     *  [ES] set filling defaulted to even-odd filling rule in the X11
             driver (rep. #1368)
     *  [ES] fixed potential memory corruption
     *  [ES] fixed page size sync in the free mode
     *  [TO] fixed a race condition in the grace_np library

    5.1.13

    Functionality
     *  [ES] enabled annotated values for HILO sets

    Parser
     *  [ES] added IMIN(x) and IMAX(x) functions returning index of minimal or
        maximal value of array x (thusly providing a way to solve reps. #1340
        and #1344)

    Portability/Compilation
     *  [ES] updates for T1lib-5.0 API (rep. #1303)

    Documentation/Info
     *  [WB] documented commands for calculating running properties

    Drivers
     *  [MD] enabled font kerning in the MIF driver

    Bug fixes
     *  [ES] Grace might fail starting in the GUI mode when a certain
             sequence of command line arguments was passed

    5.1.12

    Functionality
     *  [MO] implemented zooming and scrolling of log plots

    Parser
     *  [ES] added INT(x,y) evaluating integral value of y dx
     *  [ES] added RSUM(vexpr) - running sum

    Bug fixes
     *  [ES] fixed memory corruption when reading in block data (rep. #1258). The
             bug was introduced in 5.1.11
     *  [ES] fixed a couple of tiny memory leaks associated with loading block
    	 data
     *  [ES] fixed crash in histogram and interpolation dialogs with multiple sets
    	 selected (rep. #1259)
     *  [TO] signal issues with the grace_np library fixed (rep. #1270)
     *  [ES] implied references to current graph in parser might crash Grace if
             the graph didn't exist (including reps. #886 and #1267)
     *  [ES] removed extraneous accent glyphs in the 0x9? range of IsoLatin1 and
             IsoLatin2 encodings (including rep. #1269)
     *  [MO] IsoLatin7 encoding file wasn't installed by "make install"
     *  [ES] entering negative values of set symbol skip could crash Grace
             (rep. #1276)

    5.1.11

    Functionality
     *  [ES] hotlinks now work for all set types (rep. #572)
     *  [ES] updating hot-linked sets now works for all graphs, not the current
             one only
     *  [YZ] added encoding files for Russian codepages koi8-r and cp1251 and for
             Ukrainian codepage koi8-u

    Interface
     *  [ES] use "+"/"-" instead of "shown"/"hidden" in the graph selectors

    Parser
     *  [ES] added UPDATEALL command, equivalent of "View/Update all"

    Drivers
     *  [ES] set resolution in the PNG output (rep. #1225)

    Portability/Compilation
     *  [ES] updated auto* stuff to work with autoconf-2.5.* (rep. #1199)

    Bug fixes
     *  [SR] precision used for special tick locations was insufficient
             (rep. #1228)
     *  [ES] referring to "S_" in the parser with no sets in the current project
             crashed the app
     *  [ES] GraceIsOpen() from the grace_np library returned true after the Grace
    	 process exited (rep. #922)
     *  [ES] excluded .cvsignore files from source tarballs (rep. #1248)
     *  [ES] a minor memory leak fixed (40 bytes per set import/reading in)
     *  [ES] configure --with=f77=/absolute/path/to/f77 was broken (rep. #1243)
     *  [ES] in XY charts, explicitly check that abscissas of all sets are the same

    5.1.10

    Functionality
     *  [MO] added IsoLatin7 encoding file

    Interface
     *  [ES] disable showing hidden files in file selection dialogs by default
             and added a checkbox to alter this behaviour (Motif-2.* only)
     *  [ES] in the spreadsheet dataset editor, set text insertion position
    	 corresponding to the mouse click location

    Defaults
     *  [ES] changed default data format to %.8g (rep. #985)

    Bug fixes
     *  [ES] the default GRACE_HELPVIEWER command was incompatible with Mozilla
             (rep. #1198)
     *  [ES] fonts with long names (> 27 chars) could crash Grace (rep. #1200)
     *  [ES] font antialiasing was broken for projects with more than 16 default
             colors defined
     *  [ES] fonttool might crash on fonts with an invalid FontBBox entry
             (rep. #1202)
     *  [ES] some font glyphs might not fit in the fonttool matrix cells,
             especially on low-resolution displays
     *  [ES] canvas wasn't refreshed after a region started to be re-defined
             (rep. #1211)
     *  [ES] provided workaround for a PDFlib bug, resulting, in rare cases,
             in wrong colorspace settings in the PDF output (rep. #1209)

    5.1.9

    Drivers
     *  [MD] implemented patterned fills in the SVG driver
     *  [MD] better font name definitions in the SVG driver
     *  [MD] updated SVG DTD reference

    Compilation
     *  [PB] installed binary of convcal now gets stripped
     *  [PB] "make install links" now works
     *  [PB] DESTDIR introduced for building binary packages (e.g.
             "make DESTDIR=/tmp install links")

    Bug fixes
     *  [SR] -(no)safe flags were missed in the -help output
     *  [ES] some standard Xt flags (-geometry etc) were ignored (the bug was
             introduced in 5.1.8)
     *  [MD] patterned fills were transparent in the PDF output
     *  [MD] font family might be set inconsistently in the MIF driver
     *  [ES] xmgrace was run in the safe mode when invoked from GraceOpen() via
             the grace_np interface (rep. #1179)
     *  [ES] fixed 1/n error in calculation of correlation coefficient in the
             non-linear fit (the value was used for information purposes only).
             The bug was introduced in 5.1.5
     *  [ES] redrawing canvas in the free mode might in some cases result in
             modified graph viewport values (rep. #1176)
     *  [ES] allow trailing semicolon in the batch language (rep. #1193)
     *  [ES] some fonts couldn't be opened when running under NT4 (rep. #1186).
    	 This was a T1lib bug, in fact
     *  [ES] the cross-covariance was wrongly calculated (rep. #1196)

    5.1.8

    Security
     *  [ES] implemented (and enabled by default) "safe" mode, in which statements
             of the command language which may result in file modifications are
             disabled. This is to prevent execution of such commands contained in
             potentially malicious project files acquired from untrusted sources

    Functionality
     *  [ES] use leading zeros in axis year formats so to make up to 2 or 4
             digits in total (depending on whether the two-digit year span is
    	 enabled in the project preferences)

    Interface
     *  [ES] simplified X initialization - the resolution detection introduced
             in 5.1.5 prevented Grace from starting up with some buggy X servers
    	 (notably, StarNet's X-win32) (rep. #1138)
     *  [ES] -safe/-nosafe command line options for switching the safe mode
     *  [ES] "Run in safe mode" checkbox in "Edit/Preferences" for the same
             purpose
     *  [ES] removed broken "Command" function of the hotlink popup

    Drivers
     *  [MD] backported from 5.2 pattern fills in PDF driver (off by default)
     *  [MD] better font definitions in the MIF driver

    Portability/Compilation
     *  [ES] use strchr() instead of BSD-ish index() which broke compilation
             under newer IRIX boxes (rep. #1139)
     *  [ES] stop with error (instead of warning as used to be) if Motif can't be
    	 found by configure

    Bug fixes
     *  [ES] background of the canvas, if page filling was disabled, might get
             filled in with the last object's fill props (rep. #1152)
     *  [ES] changing HTML viewer by setting the GRACE_HELPVIEWER shell variable
             might result in memory corruption (rep. #1160)
     *  [ES] canvas wasn't refreshed after feature extraction

    5.1.7

    Functionality
     *  [ES] allow XYZ sets in polar graphs
     *  [ES] allow defining string columns when creating sets from block data
             via the command line or parser, e.g. -bxy "1:2:{3}" (rep. #978)
     *  [ES] honour symskip for all set types (it wasn't for BAR, BARDY,
    	 BARDYDY, XYHILO, XYR, XYVMAP, and BOXPLOT)
     *  [ES] extended x-correlation routines to calculate x-covariance if desired
     *  [ES] implemented optional snake-like matrix fill in graph arranging
             (rep. #1119)

    Interface
     *  [ES] accept non-ASCII characters from nationalized keyboards

    Documentation/Info
     *  [ES] added compile-time $(LDFLAGS) to the `-version' output

    Parser
     *  [ES] added an extra flag to the XCOR function to switch between
             x-correlation/x-covariance
     *  [ES] when accessing drawing objects by id (e.g. "WITH STRING nexpr")
    	 allocate the referenced object if necessary
     *  [ES] added optional argument to ARRANGE command to enable snake-like
             graph matrix filling

    Drivers
     *  [ES] set resolution of the X11 device from the X server props
     *  [ES] detect max request size of the X server and set max drawing path
             length accordingly

    Portability/Compilation
     *  [ES] fixed new Motif checks introduced in 5.1.6 (rep. #1107)

    Bug fixes
     *  [ES] applying graph properties reset axis limits of polar graphs
     *  [ES] simply ignore comments (lines beginning with '#') in data files
             instead of splitting the set (rep. #831)
     *  [ES] honour symskip for error bars (rep. #936)
     *  [ES] when enabling log axis scaling on the command line, set reasonable
             major/minor settings and world bounds (reps. #723, #1021)
     *  [ES] under very rare circumstances, Grace might cause a (probably buggy)
             X window manager misbehave
     *  [MD] make sure the EPS/PS output lines don't exceed 255 chars in lenth
             (rep. #1100)

    5.1.6

    Parser
     !  [ES] implemented region on set evaluation: REGNUM(selectset)
     *  [ES] implemented applying region and logical restrictions to a set:
             RESTRICT(selectset, vexpr) and RESTRICT(selectset, REGNUM, onoff)
     !  [ES] implemented KILL REGNUM
     *  [ES] added SUM(vexpr)
     *  [ES] allow accessing array segments (e.g. x[4:10])

    Portability/Compilation
     *  [ES] use the bundled Xbae by default to make sure we don't come across
             a buggy version installed
     *  [ES] upgraded to T1lib-1.3.1, which fixed several bugs (see below)
     *  [ES] re-wrote Motif checks; in some rare cases, Motif libraries might
             be misdetected
     *  [ES] added a "My Computer" (actually, a list of drives) file selection
             box chdir entry for the Cygwin port
     *  [ES] check for FFTW library version >= 2.1.3
     *  [ES] fixed compilation on systems without setlocale()

    Bug fixes
     *  [ES] re-loading projects with polygon regions defined might result in
             memory leaks and wrong region evaluations
     *  [ES] optimize (again) updating large pulldown selectors (rep. #1082)
     *  [ES] axis label with "Auto" placement was misplaced/absent with tick marks
             and labels disabled on the respective side (rep. #1086)
     *  [ES] in the interpolation and histogram dialogs it wasn't checked that
             the source and destinations sets were different (rep. #1084)
     *  [ES] when the invert x-axis flag was turned on, pie charts were wrongly
             reproduced in all but screen outputs (rep. #1092)
     *  [ES] when saving project under the same name, don't warn about file
             overwriting (rep. #1094)
     *  [ES] there might be problems finding fonts under non-Unix environments
    	 (rep. #1013). This was a T1lib bug, in fact
     *  [ES] text overlining didn't work for Symbol font (rep. #1026). This was a
    	 T1lib bug, in fact
     *  [ES] fixed calculation of x-correlation. Previously, a broken x-covariance
             was calculated
     *  [ES] lines starting with spaces weren't parsed  by the command interpreter
             (rep. #1101)

    5.1.5

    Functionality
     *  [ES] honour X axis start value and invert flag in pie charts
     *  [ES] extended maximum allowed line width to 20

    Interface
     *  [ES] automatically adjust Xresources for low-resolution (800x600) displays
             so all dialogs fit in the screen
     *  [ES] allow for setting via the GUI negative gaps in bar charts (rep. #1059)
     *  [ES] allow to select font and symbol sizes up to 1000
     *  [ES] make the size scale controls change by 25 and angle controls by 10
             when pressing Ctrl+Left/Right arrows on them

    Parser
     *  [ES] implicitly cast to boolean double arguments used as bool

    Documentation/Info
     *  [JS] added man page for convcal
     *  [ES] added examples of XYCOLOR set presentation and reciprocal axis scale,
             contributed by Nels Dumin
     *  [AM] include libpng, libjpeg, and libpdf versions in the `-version' and
    	 "Help/About" outputs
     *  [ES] documented S$ and S_ special parser set names

    Bug fixes
     *  [ES] PS output might be broken for plots containing XYCOLOR sets
     *  [ES] when Line type:left/right stairs was selected, drawing with a
             dashed line of multiple short steps broke the dash pattern (rep.
             #1024)
     *  [PM] the argument of --with-printcmd configure switch wasn't quoted
     *  [ES] make result file output line-buffered instead of block-buffered
     *  [LM] date format hint was ignored in the parser
     *  [ES] legend and viewport dialog were not updated when moving legend or
             resizing graph from canvas
     *  [ES] std. dev. was calculated using n instead of n-1 in the denominator
             (rep. #1042)
     *  [ES] fixed crash under some platforms with zero width world/view
    	 coordinates (rep. #1014)
     *  [ES] optimize updating large pulldown selectors (e.g. in the "Edit block
             data" popup)
     *  [ES] fixed broken AA font rendering and potential crash when the color
             palette size exceeded 128 (rep. #1061)

    5.1.4

    Bug fixes
     *  [ES] reading in a project file right after printing to a raster file
             (PNG, JPEG,...) caused a crash (rep. #990)
     *  [ES] in the "Sample points" dialog, even when the "log. expression" is
             selected, one had to input some values into start/step input fields
             anyway
     *  [AM] ellpe(x) and ellpk(x) in fact returned ellpe(1-x) and ellpk(1-x),
             respectively (rep. #989)
     *  [ES] "graphno OFF" merely makes the graph hidden instead of killing it

    5.1.3

    Interface
     *  [AM/ES] set icon's title = project name (rep. #957)
     *  [ES] when switching to log scale, set major/minor tick settings to 10/9
             respectively (rep. #826)

    Documentation
     *  [ES] docs updates (including reps. #926, #965)
     *  [EV] fixed a typo in Tutorials (rep. #916)

    Parser
     *  [ES] added "HELP url" and "HELP" to the parser
     *  [LM] added "AUTOSCALE ONREAD NONE|XAXES|YAXES|XYAXES" to the parser

    Drivers
     *  [MD] produce MIF files with a textflow in which the graph is included, so
             it can be included in another FrameMaker document
     *  [ES] list used fonts in %%DocumentNeededResources in the PS output
             (rep. #956)

    Portability/Compilation
     *  [AM] allow to specify print command at config time
     *  [AM] fixed problem compiling bundled Xbae (rep. #959)

    Bug fixes
     *  [ES] fixed rounding error in calculation of pulldown menu length
             (rep. #929)
     *  [RL] precision of offsets in the Axes dialog were restricted to two
             digits (rep. #911)
     *  [AM/ES] double click on canvas with a pie chart might cause crash
     *  [EV] legend entries for BARDY and BARDYDY sets weren't drawn
     *  [MD] fixed conversion table for non-ASCII codes in the MIF driver
             (rep. #946)
     *  [LM] reading in data files with floats when they were explicitly signed
             and positive resulted in parse error
     *  [ES] failure to save project to a file due to wrong permissions didn't
             produce an error message
     *  [ES] using non-standard fonts might crash the PDF driver
     *  [ES] specifing a file-only output device with "-hdevice" didn't actually
             set the output to file (rep. #899)
     *  [ES] the "Rescale plot on page size change" option in the
             "File/Print setup" dialog had no effect if the selected device was
             X11
     *  [ES] fixed (actually, just now implemented) automatic axis label placement
             (rep. #744)
     *  [ES] projects with sets using symbol char from the upper half of the ASCII
             table weren't saved correctly
     *  [ES] line width of drawing elements wasn't accounted for in the bbox
             calculations, which in rare cases resulted in a wrong EPS bbox

    5.1.2

    Functionality
     *  [DB] implemented baseline setting to the set (y) average

    Interface
     *  [ES] don't hardcode file extensions in file selection dialogs, but define
             them via X resources instead (rep. #671)

    Documentation
     *  [ES] HTML docs now include tables of contents

    Parser
     *  [ES] added "PAGE RESIZE xdim, ydim" which sets the page dimensions of all
             output devices (in pp) and rescales the current plot accordingly

    Drivers
     *  [ES] implemented font kerning in the (E)PS output
     *  [ES] added option to choose document data (7bit/8bit/binary) for the PS
             driver

    Portability/Compilation
     *  [AM] OS/2 updates

    Bug fixes
     *  [ES] "-saveall" filename argument was ignored (rep. #841)
     *  [ES] not enough arguments to "-world" or "-viewport" could cause crash
     *  [ES] with "Auto redraw" disabled, several operations still caused an
             immediate redraw
     *  [ES] backslashes in text strings weren't escaped in the (E)PS output
     *  [AM] interpolating non-monotonic data by spline caused crash or
             meaningless results (rep. #866)
     *  [ES] for some non-standard fonts and/or encodings, the (E)PS output might
             be binary while declared as 8bit clean
     *  [ES] path in print setup
     *  [ES] too wide pulldowns in "Edit block data" if block data contained too
             many columns
     *  [ES] it was impossible using GUI to disable annotated values in the XYZ
             set type
     *  [LM] creating sets with strings from block data might crash
     *  [ES] fixed a floating point rounding bug in the polygon clipping which
             (in rare cases under some OS's) caused set filling be performed wrong
             (rep. #874)
     *  [ES] fixed a bug in the Xbae widget crashing under a multi-head X server
             (rep. #878)

    5.1.1

    Functionality
     *  [ES] interpolation now takes into account all data set columns
     *  [ES] normalized histograms can be calculated
     *  [ES] histograms with varying bin widths - abscissas of a set can be used
             as the bin mesh
     *  [EV/ES] added GraceOpenVA() function to the grace_np API
     *  [ES] \V{} escape code in strings - baseline shift
     *  [ES] \n escape code in strings - new line
     *  [ES] a region can be linked only to a single graph
     *  [UH] implemented logit axis scale

    Interface
     *  [ES] "Edit/Locator props" popup rewritten
     *  [ES] "Spline" popup removed
     *  [ES] "Interpolation" popup rewritten; now includes the former "Spline"
             functionality
     *  [ES] "Histograms" popup rewritten
     *  [ES] "Arrange graphs" rewritten (including reps. #368, #592, #735)
     *  [ES] double click on a set selector entry now pops up the SS editor
     *  [ES] date/time format can be used in the SS editor to display/enter values
     *  [ES] many other enhancements in the SS editor
     *  [ES] if the XmHTML widget library is available, it will be used for
             displaying on-line help ("Gracilla"). The libhelp support is
             scheduled to be withdrawn soon
     *  [ES] removed -[no]logwindow command line options and X resource
     *  [ES] removed -arrange, -cols, and -rows command line options
     *  [ES] "Results" and error message windows merged into "Console"
     *  [ES] menubar added to the "Graph appearance" dialog
     *  [ES] "File/Read/Sets" and "File/Write/Sets" moved to the "Data/Import"
             and "Data/Export" submenus, respectively
     *  [ES] "File/Read/Parameters" and "File/Write/Parameters" moved to the
             "Plot" menu
     *  [ES] renamed "File/Device setup" to "File/Print setup" and added
             "View/Page setup" (same dialog but with X11 as the selected device)
     *  [ES] split axis/tick label offset input fields into two

    Documentation/Info
     *  [WB] some fixes/additions to the User's Guide
     *  [AM] include Xbae version in -version and "Help/About"
     *  [DP] User's Guide additions
     *  [EV] Tutorials updated
     *  [AM] man page corrections
     *  [ES] re-enabled on-line help for several dialogs

    Parser
     *  [ES] removed restriction on the max line length (512) in parameter files
     *  [ES] SPLINE, ASPLINE, and INTERP removed and INTERPOLATE added which
             includes the functionality of the former ones
     *  [ES] added RAND(N) - creates an array of N random numbers
     *  [ES] HISTO renamed to HISTOGRAM and syntax changed
     *  [ES] changed syntax of ARRANGE command
     *  [ES] removed UNLINK REGNUM FROM selectgraph; now that a region links to a
             single graph only the command makes no sense
     *  [DP] added READ NXY CHRSTR for reading in data in the NXY format

    Portability/Compilation
     *  [ES] configure checks for netCDF version
     *  [AC] a couple of configure fixes
     *  [AM] check for build/runtime Xbae version match
     *  [AM] OS/2 updates
     *  [JH] VMS updates

    Bug fixes
     *  [ES] fixed text under/overlining in SVG
     *  [ES] fixed dashed patterns for thick lines in SVG
     *  [ES] a bug in interpolation caused crash under some conditions (rep. #783)
     *  [ES] fixed overflowing of some tables in dvi output of the User's guide
     *  [ES] fixed interpolation of reversed arrays (rep. #675)
     *  [ES] fixed a memory leak in interpolation using splines
     *  [ES] there was no automatic canvas refresh after performing interpolation
     *  [ES] there was no automatic canvas refresh after changes in locator props
     *  [ES] fixed "\\" in strings
     *  [ES] check for positive page dims and dpi in device setup (rep. #779)
     *  [ES] invert logics of the yesno dialog popped up if printout is truncated
             (rep. #778)
     *  [JSB] text color might be wrongly set on raster devices with antialiasing
             off (rep. #803)
     *  [ES] memory leak fix in the SS editor
     *  [ES] "File/New" didn't update project description in "File/Save as"
     *  [ES] graph operations on killed graphs result in crash (rep. #805)
     *  [ES] drawing objects cursor remained active after closing window
             (rep. #807)
     *  [ES] switching between (overlaid) graphs updated the locator bar only
             after pointer move (rep. #808)
     *  [GJ] canvas didn't refresh on autoscale shortcut (rep. #809)
     *  [ES] initial values of fit parameters with bounds set were printed wrongly
             in the "Results" window
     *  [ES] disable canvas events on hidden graphs
     *  [ES] white space at the beginning of text strings wasn't accounted in bbox
             calculations
     *  [ES] fixed wrong initial canvas size in the free page mode (rep. #821)
     *  [ES] fixed set split crash
     *  [ES] couldn't use constant expressions in "Load & evaluate" (rep. #828)
     *  [ES] a severe memory leak in "Load & evaluate" fixed
     *  [ES] regions were displayed wrongly on plots with several graphs

    5.1.0

    Functionality
     *  [ES] VMAP plots implemented (rep. #440)
     *  [ES] BOXPLOT sets re-implemented. The control over appearance details is
             more detailed than in Xmgr (including rep. #188)
     *  [ES] XYSIZE sets implemented (a generalized form of "bubble" plots)
     *  [ES] XYCOLOR sets implemented (rep. #484)
     *  [ES] pie charts implemented
     !  [EV] set restrictions in "Window/Point explorer"
     *  [ES] \#{} escape code in strings - allows to enter non-printable chars by
             their hex codes
     *  [ES] \r{} escape code in strings - text rotation
     *  [ES] \q, \Q escape codes in strings - start/stop text slanting (rep. #716)
     *  [ES] \l{} escape code in strings - slanting text with any factor
     *  [ES] \t{}, \T{} escape codes in strings - generic text coordinate
             transforms
     *  [ES] \R{} escape code in strings - changes color inside a string
             (rep. #535)
     *  [ES] \Fl, \FL escape codes in strings - start/stop ligature processing
     *  [ES] \Fk, \FK escape codes in strings - start/stop kerning pair processing
     *  [ES] more font encoding files added
     !  [ES] alternative tick labels ("transformed" axes) (rep. #93)
     *  [ES] changed default placement of error bars to two-sided (rep. #737)
     *  [ES] for XYBAR/XYBOXPLOT sets draw the symbols in the legend with the
             fixed height (of the legend text) for better readability (rep. #741)
     !  [ES] user-defined tick labels are no longer allowed without tick mark
             positions
     !  [ES] autoticking now alters # of minor ticks only if the current value
             is anomalous
     *  [LM] allow to use 'T' as date-time separator (as recommended by ISO8601)
     *  [ES] new fonts from GNU gs-5.50 (including the euro symbol)

    Interface
     !  [ES] re-designed "Create by formula"; any set type can be defined
     !  [ES] controls for justifications of strings cover all possibilities
             (vertical and horizontal alignments)
     !  [ES] combined point ops dialogs into one, "Window/Point explorer"
     *  [ES] print all point data (was only x, y) during point tracking
     *  [ES] (optional) set comments in set selectors
     *  [ES] "File/Describe" merged with "File/Save as"
     *  [ES] reading in block data no longer resets set column selectors
     *  [ES] implemented the color sync option in the "set app." dialog
     *  [EV] "-barebones" command line switch (switch all tool bars off)
     *  [ES] annotated strings can be modified in the spreadsheet editor
     *  [ES] in "File/Device setup", introduced options to sync page size of all
             devices and rescale plot on page size change

    Drivers
     *  [LM] FrameMaker MIF driver added (rep. #590)
     *  [LM] implemented SVG driver
     *  [ES] PS Level 1/2 option in the EPS driver
     *  [ES] now any font encoding is correctly represented in (E)PS output
     *  [ES] added under/overlining to the E(PS) driver (rep. #756)
     *  [ES] PS output made a bit more compact
     *  [ES] under/overlining now works in PDF output
     *  [ES] PDF driver setup options: 1.2/1.3 compatibility and compression
             level
     *  [ES] use "thin" lines in X11 driver if the line width <= 1 pixel
     *  [ES] list fonts, colors and other resources in the metafile driver
     *  [ES] don't rotate output in EPS landscape mode
     *  [ES] optionally set hardware resolution in PS output
     *  [ES] in PS driver, option to select input tray: auto/manual/match page
             dimensions

    Documentation/Info
     *  [AM] omit a few GUI-specific flags/help strings when compiling a GUI-less
             exec
     *  [EV] Tutorials updated - added a regions section and updated the create
             by formula
     *  [LM] added usage help for convcal
     *  [HS] updated instructions for Motif-2.1 bug work-around
             (<Ctrl>+<left mouse button> = crash) in the FAQ
     *  [ES] re-structured the FAQ
     *  [ES] documented numeric operators and functions

    Parser
     *  [ES] finally, introduced variables (usual and 1D arrays)...
     *  [ES] as a result of the above, removed scratch arrays (A, B, C, D)
     !  [DP] SWAP selectset AND selectset
     *  [ES] EXIT(iexpr)
     *  [ES] enlarged parser buffer to 4K

    Portability/Compilation
     *  [ES] new configure options (including rep. #757)
     *  [ES] the GRACE_HOME dir is now set by `configure' as PREFIX/grace
             (rep. #758)
     *  [ES] checks for proper versions and consistency of libs and includes
     *  [AM/ES] checks for Motif/LessTif run-time clash
     *  [ES] the grace_np Fortran wrapper is compiled independently of whether a
             F77 compiler has been found
     *  [JH] VMS updates
     *  [AM] OS/2 updates

    Bug fixes
     *  [ES] "duplicate graph" caused memory corruption (rep. #752)
     *  [ES] too long text strings (>255) crashed Grace (rep. #759)
     *  [ES] parser errors in too long lines (>255), if processed from a RTI
             caused crash
     *  [ES] using very long formulae (>~100) in the non-linear fit caused
             memory corruption
     *  [ES] text strings were justified by the lower edge of the bounding box
             instead of the baseline (rep. #710)
     *  [ES] "-" in PS output was squeezed (rep. #711)
     *  [RW] empty src/buildinfo.h prevented further compilation (rep. #717)
     *  [ES] fixed \m{} in the beginning of a string
     *  [AM] fixed reading in files with DOS <cr>
     *  [ES] graph overlay fixes (including rep. #734)
     *  [ES] fixed spurious error message about non-monotonic bins when
             calculating histograms (happened sometimes due to a rounding error)
     *  [ES] histogramming from command file crashed (rep. #736)
     *  [KS] the lower error bar in BARDY and BARDYDY was shadowed by bar
     *  [ES] rescaling did not follow mouse (rep. #715)
     *  [JM] a workaround for strange behaviour of some versions of Motif resulting
             in several popup windows being too big (rep. #720)
     *  [AH] on some platforms, "make install" moved files instead of copying
             (rep. #743)
     *  [AM] feature extraction didn't update set lists (rep. #731)
     *  [ES] fixed triangle symbols (now correctly centered)
     *  [ES] font antialising was broken on X displays with 24 bits per pixel
             format of pixmaps
     *  [EV] feature extraction/FFT was incorrectly determining if the set length
             was a power of 2 (unimportant if FFTW was used)
     *  [ES] upon loading a project, set print file name automatically (rep. #641)
     *  [ES] fixed a memory leak in set sort
     *  [ES] fixed bugs in set and point operations with sets containing annotated
             strings (including rep. #767)
     *  [ES] in "Window/Results...", the vertical scrollbar was missing when
             compiled with Motif-2.1
     *  [ES] closing (by means of window manager) a dialog with file selection
             box in it rendered the window unusable next time it was popped
             up (rep. #743)

    5.0.5

    Functionality
     !  [ES] long drawing paths (of polylines and polygons) with length exceeding
             a threshold are transformed to be shorter than the limit; the latter
             is adjustable in "Edit/Preferences" popup. This works around internal
             restrictions of some devices, notably old X11 and PS, causing visual
             data point drops (rep. #634, #651)

    Interface
     *  [ES] the "Autoscale on read" option moved back from "Edit/Preferences"
             to "File/Read sets"
     !  [ES] added "Autoscale on load" for creating sets from block data
     *  [ES] added possibility to select target set(s) produced from a block
             data (rep. #87)

    Documentation/Info
     *  [ES] added docs on adding/replacing fonts
     *  [AM] miscellaneous FAQ updates

    Portability/Compilation
     *  [AM] OS/2 updates
     *  [JH] VMS updates (including rep. #681)
     *  [ES] fixed compilation on HP/UX-11.0
     *  [ES] compilation outside of the source tree is now possible

    Bug fixes
     *  [HS] fixed text string copy/edit bug (rep. #661)
     *  [LM/ES] under some conditions, project or parameter saving caused
             crash (rep. #678)
     *  [ES] quotes were not escaped in several places (append/prepend strings
             of tick labels, avalues etc)
     *  [LM] setting reference date worked incorrectly since did not ignore
             current reference date
     *  [ES] a Linux libc5/locale memory leak workaround (rep. #676)
     *  [ES] a parser memory leak fixed
     *  [ES] applied a patch to fix a nasty memory leak in the bundled T1lib
     *  [ES] compiling GUI-less version failed (rep. #680)
     *  [ES/HS] a workaround for bug in Motif-2.1 (<Ctrl>+<left mouse
             button> crashed) (rep. #685)
     *  [OT/ES] fixed a floating point overflow, causing crashes on non-IEEE
             compliant FPU (rep. #689)
     *  [AM/ES] problems with autoscale and log axis scales (rep. #325, #688)
     *  [ES] killing set data erroneously set the "hidden" flag of the set on
             (rep. #691)
     *  [ES] hidden sets were not saved (rep. #338)

    5.0.4

    Functionality
     *  [ES] nonl-fit: added region restrictions (rep. #251)
     *  [ES] nonl-fit: added optional stat weights
     *  [ES] print some basic statistics on the non-linear fit quality
     *  [LM] implemented proper rounding for date/time axis formats
     *  [ES] in PS output, issue an explicit page size selection call. This
             should allow to automatically choose between several input trays
             with different paper (for printers that have mutiple trays, of
             course)

    Interface
     *  [ES] nonl-fit GUI reworked (including part of rep. #77)

    Documentation/Info
     *  [AM] docs on building DL modules under OS/2

    Parser
     !  [ES] extended variant of NONLFIT added: NONLFIT (selectset, vexpr, nexpr).
             The vexpr argument is an array of weights (of proper length)

    Defaults
     *  [ES] the default template had the 2-digit year format enabled and
             the wrap year set to 1900, imitating older versions. Changed to
             off and 1950 respectively - should be more Y2K compliant :)

    Portability/Compilation
     *  [ES] upgraded to T1lib-0.9.2 (fixing rep. #650)
     *  [AM] OS/2 updates
     *  [AM/ES] header files of the bundled Xbae and T1lib could in some cases
             clash with system-wide installations of respective library

    Bug fixes
     *  [ES] strings (titles, legends,...) with only spaces in them caused crash
             (rep. #640)
     *  [ES] enabling bounds for fit parameters in the non-linear fit popup
             crashed Grace (rep. #642)
     *  [HF/ES] fixed bug in creating sets from block data (rep. #644)
     *  [ES] "rawbits" PPM format was broken on big endian machines (rep. #645)
     *  [ES] in the non-linear fit window, set was deselected after each step of
             fit (rep. #646)
     *  [JB] WRITE setselect crashed
     *  [ES] fixed crash when selecting "Show data-less" or "Show hidden" from
             set popup menus (rep. #652)
     *  [LM] fixed a few bugs in the date/Julian day conversion
     *  [LM] fixed "day of week" format that was broken for negative dates
     *  [ES] use "%g" format in the point tracking window
     *  [ES] selecting multiple graphs in "graph appearance" corrupted titles/
             subtitles (#566)
     *  [ES] couldn't parse data from multicolumn files containing non-numerics
             fields (rep. #655)
     *  [ES] the user tick locations were saved with insufficient precision;
             now we use the same format as for storing data sets (rep. #298)

    5.0.3

    Functionality
     !  [ES] added "Fixed" graph type (rep. #556)
     *  [ES] XYR set is back
     !  [ES] filled circles in XYR (rep. #206)
     *  [ES] RtoL text advancing (not yet if using device fonts)
     !  [ES] extended options for line arrows - see "examples/arrows.agr"
     *  [ES] automatic allocation of drawing objects; -maxlines and like
             command line options removed
     *  [LM] RTI is processed also when running in gui-less or batch mode
     *  [LM] millisecond resolution of timer
     !  [ES] added XYdXdXdYdY set type
     !  [ES] color & pattern of error bars can be selected independently from
             symbols
     !  [ES] arrow clipping of error bars (rep. #451)
     *  [ES] no limit on number of columns in block and nxy data reads anymore
             (reps. #357, #596)
     *  [ES] empty line works as set delimiter (#540)
     *  [ES] added JPEG backend
     *  [ES] added PNG backend
     !  [ES] any set type now may have an additional column of text strings
             associated; as a result, the XYSTRING set type removed
     *  [ES] canvas page dimensions, as saved in the project file, set the
             page dimensions of all devices (which afterwards can be adjusted
             separately)
     *  [LM] Grace now can parse input data in several date/time formats,
             including the recommended ISO8601
     *  [LM] reference date for date conversions is adjustable
     *  [LM] 2-digit format for years for the current century is now optional and
             the wrap year is adjustable

    Interface
     *  [ES] start in the command line interface (CLI) mode if the exec's
             name is "grace"
     !  [ES] dataset operations GUI re-worked
     *  [ES] new canvas hotkeys for drawing objects (rep. #585)
     *  [ES] changind axis scale to Log updates world min if necessary
             (rep. #625)
     !  [ES] all file selection box (FSB) dialogs replaced (fixing reps. #465,
             #549, #568)
     *  [ES] "File/Working dir" removed, since this option is in any FSB now
     *  [ES] "File/Read/Block data" removed - it's in the "File/Read/Sets" now
     *  [EV] in the non-linear fit popup, allow to use expressions when giving
             bounds for the loaded function
     !  [ES] applying changes in "Set appearance" for multiple sets selected
             doesn't act on legends by default; this can be changed from the
             "Options" menu (part of rep. #588)
     *  [ES] added "File/Revert to saved"
     *  [ES] -nxy command line flag requires a filename immediately after it
     *  [ES] use GXinvert rather than GXxor for rubberband lines by default
     !  [ES] "Evaluate expression" rewritten
     *  [HS] invert selection in set/graph lists
     !  [ES] removed column width controls from SS editor; the spreadsheet
             columns may be resized with Shift+middle button
     !  [ES] option to select set string column from block data

    Documentation/Info
     *  [AM/ES] many more buildinfo details are displayed by "-version" command
             line option
     *  [LM] many User's Guide additions/updates
     *  [AM/ES] added man page for grace/xmgrace/gracebat
     *  [AM] added man page for grconvert
     *  [AM] FAQ updates (including rep. #562)
     *  [ES] FAQ updates (including reps. #580, #587)
     *  [ES] "Help/Examples" menu tree

    Parser
     *  [HS/ES] several logical constructs of mixed type arguments (vector and
             scalar) didn't work
     *  [ES] added '?' and ':' to the operator precedence list; no conflicts in the
             parser anymore
     *  [ES] no need for () around boolean expressions
     !  [ES] new color selection options: COLOR "name", COLOR (R, G, B)
     !  [ES] PRINT TO DEVICE added; PRINT TO "filename" doesn't actually
             print, only sets the output to a file (rep. #605)
     !  [LM] TIMER NUMBER - set timer's resolution
     !  [ES] G.S can be used anywhere
     !  [ES] allow to use SET[index] amd GRAPH[index] for set & graph
             selections
     !  [EV] REVERSE setselect
             APPEND setselect TO setselect
             SPLIT setselect number
     !  [ES] no setno.extremetype
     !  [ES] extremetype(vexpr)
     !  [ES] expressions can be used virtually in any statement (where only numbers
             were allowed formerly)
     !  [ES] checks for expression types
     !  [ES] JDAY function (has been never documented) renamed to DATE
     !  [ES] removed INDEX and LOAD SCRARRAY
     !  [ES] added MESH (a la linspace)
     !  [ES] several statements per line are allowed, separated by ';'
     *  [ES] PAGE SIZE x y -> PAGE SIZE x, y
     !  [LM] REFERENCE DATE, DATE WRAP onoff, DATE WRAP YEAR iexpr
     !  [ES] strict array length checks

    Defaults
     !  [LM] the default value for the timer has been reduced from 1000 to
             200ms
     *  [ES] sformat is saved in projects

    Portability
     *  [ES] configure honours $CC; if available and not overridden, gcc will
             be picked
     *  [ES] motif find fix
     *  [ES] Irix-6.5 config fix (rep. #558)
     *  [ES] compilation errors when using some weird old versions of make
             fixed (rep. #583)
     *  [ES] configure checks for declarations of all math functions
     *  [ES] removed the remnants of support for Motif-1.1
     *  [ES] PDF driver updated to use pdflib-2.01
     *  [ES] updated to Xbae-4.7 (which fixed rep. #560)
     *  [ES] T1 font machinery updated to T1lib-0.9.1
     *  [ES] no need for GD lib (for raster drivers); a customized version is
             included
     *  [AM] OS/2 updates
     *  [JH] VMS updates

    Bug fixes
     *  [MR] popping up PS GUI setup window caused crash (rep. #563)
     *  [ES] set split was broken in 5.0.2
     *  [EV] frequency/period feature extraction fix (rep. #538)
     *  [ES] in the PS driver, pattern fills were not opaque (rep. #567)
     *  [ES] crosshairs were left as lines on canvas (rep. #571)
     *  [ES] description length was limited to 2K (rep. #575)
     *  [ES] setting negative offsets for PS driver was impossible via
             GUI (rep. #579)
     *  [ES] antialiased (default) text strings were invisible on mono X terminals
             (rep. #582)
     *  [ES] join sets is working now (rep. #513)
     *  [ES] error bar clipping wasn't enabled
     *  [ES] error bars were drawn above symbols
     *  [ES] settings from "Ellipse props..." were ignored
     *  [ES] Bitmapped strings with no AA were broken in the PDF output
     *  [ES] non-POSIX locales caused invalid PS output in rare cases
     *  [LM] detect cases of accesses beyond array bounds of drawing objects
     *  [ES] problems with operations with sets of different lengths (rep. #227)
             resolved
     *  [HS] "Start load at" of the regression window was ignored
     *  [ES] non-linear fit didn't work in batch mode for any but S0 set
     *  [ES] fixed crashes with log axes (rep. #282, #525)
     *  [AM/ES] fixed crashes when major tick spacing was equal to 0 (rep. #591)
     *  [AM] the default filename of hardcopy output was truncated at first
             period (rep. #593)
     *  [LM] several bugs in date formats fixed
     *  [ES] locator properties didn't work; changing the locator format
             caused chaotic behavior (rep. #621)
     *  [ES] patterned fills of ellipses gave segmentation fault (rep. #616). This
             was a GD library's bug, in fact

    Misc
     *  [ES] removed GD and GIF backends (the latter due to patent issues)
     *  [LM] an auxiliary utility added (convcal) to convert between "usual"
             and julian day date formats. This obsoletes the former greg2jul.c
             and jul2greg.c utilities.

    5.0.2

    Functionality
     *  [ES] graphs and sets are allocated dynamically; -maxgraph, -maxsets and
             -graphsets removed
     *  [ES] XY chart is back
     *  [ES] XYZ set type is back
     !  [ES] new chart set presentations: stacked line and scatter
     !  [ES] new options for charts (different bar border/fill colors and
             patterns etc)
     !  [ES] inter-bar gap for bar charts is adjustable (rep. #198)
     !  [ES] new set type: BarDY (bar charts with error bars)
     *  [ES] precision can be used for XYZ sets (rep. #519)
     *  [ES] new set auto-coloring is back
     *  [ES] added 16 new patterns
     *  [ES] added a few more line styles (rep. #305)
     !  [ES] legends can be displayed in reverse order (rep. #205)
     *  [ES] legends are drawn by default
     *  [ES] enhanced backward compatibility with Xmgr
     *  [ES] in free mode, auto-re-scale all the plot objects (imitating Xmgr)
             (rep. #537)
     !  [ES] color map stuff (rep. #512)
     !  [AM] auto-scaling with range restrictions
     *  [LM] added internals for RT (real time) input monitoring
     !  [LM] grace_np library now uses anonymous instead of named pipes
     !  [ES] write format is used for all dataset types
     !  [ES] FP line widths (rep. #483)
     !  [ES] locale, if available and set, is used for numeric labels
     *  [ES] in case of crash, Grace tries to save the project anyway
     !  [ES] added an option to fill (or not to) the page background
     *  [ES] Grace honors $GRACE_PRINT_CMD environment variable (rep. #522)
     *  [ES] PS and PDF drivers optimized for speed and file size
     *  [ES] added color/gray-scale and bbox:tight/page options to the EPS driver
     *  [ES] added adjustable printer page offsets to the PS driver
     *  [ES] warning issued on truncated printout (if display and hard-copy
             device aspect ratio don't coincide, for example)

    Interface
     !  [ES] menu shuffles
     !  [ES] new graph selectors - with many operations available from the popup
             menu (right mouse button)
     !  [ES] new set selectors - with many operations available from the popup
             menu (right mouse button). Set selectors in the Data/* popups are
             of the old style yet
     *  [ES] pattern selectors have pattern bitmaps displayed
     *  [ES] line style selectors have dash bitmaps displayed
     *  [ES] graph number for ops is automatically graph that has focus
             (rep. #104)
     !  [ES] (approximate) number of tick divisions for auto-ticking is set in
             "Axis properties" now instead of "Autoscale"
     !  [ES] a simplistic (by now) fonttool added
     *  [ES] removed all set pick operations
     !  [ES] "Set appearance/Edit/*" now act on selected sets only
     *  [HS] it's possible to refer to the index of blockdata as column 0
             via command line (rep. #464)
     *  [ES] removed -xy, -xydy etc command line flags; use -(set)type instead
     *  [ES] -source stdin removed
     !  [ES] "-" and "stdin/stdout" can be used anywhere (rep. #486)
     *  [ES] Block data window reworked
     !  [ES] canvas events redone
     *  [ES] immediate feedback for drawing object reposition/editing is
             back (rep. #532)
     !  [ES] Activate/Edit/Create/Reactivate Set menu confusion eliminated
             (rep. #136)
     *  [ES] print popup fixes
     !  [ES] in the X11 driver, put dots every 0.1 viewport (visible only
             if the page bg is not filled)
     !  [ES] <Ctrl+E> from text inputs fires up font tool
     *  [ES] xwindow title has "Grace: " prefix prepended and, if project is
             modified, "(modified)" suffix
     !  [ES] removed "Clear all" and added "New" instead
     !  [ES] removed "Verify Pick sets operations" option, added "Don't
             ask questions" (same as -noask)
     !  [LM] added -dpipe command line switch for monitoring an already open
             file descriptor
     *  [ES] removed -symcolorbug command line option
     *  [ES] removed -dc/-nodc, -redraw/-noredraw, -GXxor/-GXinvert command
             line options
     *  [ES] max error count upon reading in reduced from 50 to 5

    Documentation/Info
     *  [ES] old HTML docs removed; a draft version of User's Guide added
     *  [EV] Tutorials prepared. It's a recommended reading not only for newbies,
             especially taking into account the rudimentary state of the User's
             Guide
     *  [AM] -version additions

    Parser
     *  [ES] device commands (rep. #490)
     !  [ES] VXMAX and VYMAX - max viewport values of the current device
     !  [ES] TRUE/FALSE and ON/OFF are interchangeable
     !  [ES] NEW - start new project from scratch using default template;
             NEW FROM "filename" - start new project from scratch using filename
             template
     !  [ES] MAP COLOR color_id TO (R, G, B), "colorname"
             (0 <= R, G, B < 256)
     !  [ES] S$ - currently processed (in parser) SETNUM
     !  [ES] S_ - recently assigned SETNUM (e.g., after a data have been read in)
     !  [ES] SETNUM.ID - id of the set (i.e., S5.ID is 5)
     !  [ES] G$, G_ and GRAPHNO.ID - same as above, but for graphs

    Defaults
     *  [ES] toolbar X resources
     !  [ES] use IsoLatin1 encoding if Default.enc is not found
     *  [ES] gracerc magic path
     !  [ES] gracerc re-read upon SIGHUP
     *  [ES] templates (rep. #520)

    Portability
     *  [LM] grace_np library now compiles and works correctly on OS/2 and Win32
             (in addition to all Unices, of course). There is an unresolved
             problem with VMS, though
     *  [ES] added configuration for use of lcc as compiler
     *  [JH] VMS updates
     *  [AM] OS/2 updates
     *  [ES] grconvert works on Win32
     *  [ES] Win32 port should compile out of the box

    Bug fixes
     *  [ES] configure issued wrong messages
     *  [ES] drawing objects might not be drawn sometimes
     *  [ES] fixed patterns #7, #14 and #15
     *  [ES] fixed rounding errors in clipping routines (in particular, rep. #476
             and #504)
     *  [EV] a feature extraction bug fixed
     *  [ES] view/world coords in string edit (rep. #469)
     *  [LM] input data line length restriction removed (rep. #260, #357,
             #443)
     *  [ES] npipe "buffer overflow" fixed
     *  [ES] npipe load bug fixed
     *  [LM] linear regression on a two-point set was performed wrongly
     *  [ES] spreadsheet fixes and clean-ups (rep. #203, #259, #409)
     *  [ES] auto-scale fixes (rep. #510)
     *  [LM] configure fixes
     *  [LM] updated several explanation strings on example files with the new
             GUI layout
     *  [LM] the correct stack depth was displayed only after cycling
     *  [ES] regions and graph fixed points not drawn in hardcopy output anymore
     *  [ES] if no set has a legend string defined, the empty legend box is not
             drawn (even when legends are enabled)
     *  [ES] Disk/Pipe selector was broken (rep. #454)
     *  [ES] Set appearance/Data/Load comments didn't update GUI settings
             for the currently selected set (rep. #474)
     *  [ES] ignore non-printable characters in formulae (rep. #241)
     *  [ES] working dir not initialized (rep. #470)
     *  [ES] `make tests' failed if ran before `make install' (rep. #491)
     *  [ES] incorrect postscript output of bar charts fixed (rep. #341, #410)
     *  [ES] fixed crash if applying axis settings to all graphs (rep. #503)
     *  [ES] warning popup on exit sometimes appeared even after no changes
             have been made (rep. #274)
     *  [ES] auto-scale didn't work if specified from the command line together
             with some other arguments (rep. #385, #441)
     *  [ES] File/Write/Sets didn't work for multiple set selection (rep. #394)
     *  [ES] strange font size decrement (rep. #242)
     *  [ES] crashes on SGI when accents are used in the legends (rep. #268)
     *  [ES] Strings & Things : Default size is zero on HP (rep. #288)
     *  [ES] sometimes in plots with multiple graphs, one couldn't get the x axis
             tick marks or labels to be displayed on any of the graphs except for
             graph 0 (rep. #339)
     *  [LM] in applications linked against grace_np, a call to system() or
             like functions would abort execution (rep. #382)
     *  [ES] Core dump in SetSelectedSet if optimized (rep. #366)
     *  [ES] misc other bug fixes

    Misc
     *  [ES] memory consumption reduced (typically, 0.5 MB less than that
             of 5.0.1 and about same as of Xmgr-4.1.2)
     *  [ES] removed "Coalesce sets" (will be back in 5.0.3)
     *  [ES] no input date/time formats (a smart input data filter is planned
             for 5.0.3). Please use Julian dates for a time being

    5.0.1

    Functionality
     !  [ES] added FORMAT_SCIENTIFIC, FORMAT_ENGINEERING
     !  [ES] polar plots (a work in progress - far from being completed, but
             definitely better than nothing :))
     !  [ES] added tunable offsets for tick labels (in particular, rep. #467)
     !  [ES] added option of placing axis ticks at rounded positions (rep. #124)
     *  [HS2] implemented axis label placement op (normal/opposite side)
              (rep. #463)
     *  [HS2] changed tick and axis label offsets from (x,y) to
              (parallel/perpendicular)
     *  [HS2] introduced tick label placement auto/spec (similar to axis label)
     !  [ES] fill rules for sets: winding/even-odd; not honored by raster formats
     !  [ES] smart colormap management: -install/-noinstall flags force a given
             behavior; default is to switch to the private colormap automatically
             as needed
     !  [ES] -rvideo now acts on all devices; XMgrace.reverseVideo removed from
             the list of X resources
     !  [ES] selecting devices by names instead of numbers; "-device" command
             line argument renamed to "-hdevice"; GR_HDEV not used anymore
     !  [ES] zero axes are back. Now, both "primary" and alternative axes can be
             "zero" ones
     !  [ES] PDF device options added: binary/ASCII output; misc fixes
     !  [ES] GIF device options added: transparent and interlaced output
     !  [ES] PS device options added: grayscale/color; Level2 toggle is back (in
             fact, nobody of developers has a Level 1 printer to really check it)
     *  [ES] fixed bug when text strings might be typed wrong sometimes in the PS
             output
     *  [ES] all drivers slightly rewritten
     !  [ES] added PNM (PBM/PGM/PPM) device (both ASCII and "rawbits" outputs)
     !  [ES] Courier font family added
     *  [ES] added \f, \h, \v, \z, \m, \M and \d string controls. Load typeset.agr
             in the "examples" dir to get an idea
     !  [ES] in the batch language, in any statement with FONT NUMBER, the
             font selection can be done by fontname instead of the number:
             FONT "fontname"
     !  [ES] Grace can now use any number of user-defined fonts, both in addition
             and as a replacement for bundled ones (rep. #26)

    Documentation/Info
     *  [HS] added a text (http://plasma-gate.weizmann.ac.il/Grace/y2k.html)
             on the Year 2000 problem (rep. #342)
     *  [HS2] new extended FAQ written
     *  [AM] version string includes GUI toolkit (Motif/Lesstif/None)
     *  [AM] help screen updated
     *  [ES] font docs (doc/fonts.html) updated

    Portability
     *  [ES] configure should now be smarter about finding Motif (rep. #416)
     *  [ES] added configuration file for Interix (aka OpenNT) (rep. #437)
     *  [ES] SunOS4 build fixes
     *  [AM] OS/2 updates

    Bug fixes
     *  [AM] "Read/Block data" crash fixed (rep. #445)
     *  [ES] Zooming now zooms exactly to the window specified by mouse (rep. #5)
     *  [ES] "AutoT" doesn't alter graph min/max values (rep. #165)
     *  [ES] killing sets in polar plots with parameters preserved caused crash
             (rep. #125)
     *  [HS2] ellipses might be sometimes drawn incorrectly in X11
     *  [ES] a memory leak in "Edit String" fixed
     *  [HS] leap year function corrected
     *  [ES] XYString sets were not saved (rep. #452)
     *  [ES] Disk/Pipe selector was broken (rep. #455)
     *  [AM] fixed broken axis scaling when set min/max was +/- Inf
     *  [EV] stack manipulation fixed (#417)
     *  [AM] "-version" now outputs to stdout instead of stderr
     *  [ES] misc small fixes

    5.0.0 (since Xmgr-4.1.2):

    Functionality
     *  [ES] T1 fonts are used for all devices using the T1lib library of Rainer
             Menzner. There should be no discrepancies anymore between characters
             displayed and printed (rep. #16)
     *  [ES] routines of drawing layer rewritten from the scratch; Grace is now
             almost WYSIWYG, except patterns (rep. #184)
     *  [EV] generic I/O filtering implemented (including rep. #240); see docs
             for details
     !  [ES] reciprocal axis scale implemented (rep. #33)
     *  [EV] system-wide gracerc ($GRACE_HOME/gracerc) will be read at startup
             time, if exists
     !  [ES] overlined strings are possible (\o \O) (rep. #176). Doesn't work with
             device fonts yet
     !  [MM] extensions to regions including horizontal-inside, horizontal-outside,
             vertical-inside and vertical-outside
     !  [MM] Grace will use the FFTW library for Fourier transform if present on
             the system; see README.FFTW
     *  [MM] negative indices in "Drop points" allowed (counting from the end of
             a set)
     *  [EV] added a new feature to be extracted - the integral of each set
     !  [ES] "unit" and "const" added to the possible proctype's for modules.
             DEG (below) is an example what "unit" can be used for
     !  [ES] DEG and RAD are now meaningful. E.g., expressions like sin(90 deg)
             and sin(pi/2 rad) both are legitimate (and equivalent!) ("rad" can be
             omitted - it's there just for the sake of completeness)
     *  [ES] metafile driver (not in final state)
     *  [ES] PDF driver using the PDFlib of Thomas Merz; see README.PDF
     *  [ES] GIF/GD driver using the GD library of Thomas Boutell (rep. #14); see
             README.GIF
     *  [ES] logarithmic scales can have any base (rep. #370)
     *  [ES] patterns and colors can be used simultaneously (rep. #291)
     *  [ES] power tick label format changed to work in scientific format
             (rep. #361)
     *  [ES] \B in composite strings will reset the font to the string's initial
             font (rep. #388)
     *  [ES] PS/EPS driver rewritten from the scratch
     *  [ES] X11 driver heavily rewritten

    Interface
     !  [ES] removed "Plot/World scaling" popup
     !  [ES] re-designed axis props GUI popup (in particular, rep. #63, #313)
     *  [EV] point ops popup fixes
     !  [ES] graph appearance props GUI popup
     !  [ES] removed "Viewport", "Frame", "Titles" and "Legends"  popups.
     !  [ES] removed "Error bars" and "Edit legends"  popups.
     !  [ES] re-designed set appearance props GUI popup (rep. #311, #369 should be
             fixed)
     *  [EV] added expression evaluation to text input fields in all widgets
     *  [EV] error window changed - only 1 window, not 1 window per error
     !  [EV] regression fits can be applied to specified interval and results are
             printed out in readable form
     *  [EV] scrolled windows for explicitly requested expressions
     *  [EV] canvas hotkeys added
     !  [ES] re-designed print setup GUI popup (problems in rep. #372, #412
             should be fixed)
     *  [ES] changing page size is possible for any device separately; the units
             can be "pix"els, "cm" or "in" (rep. #108, #211, #216, #405)

    Project files
     *  [EV] background color saved
     *  [MM] all regions, whether active or not, are saved to the file, so
             temporarily inactive regions don't get lost
     *  [ES] page size is saved (rep. #312)

    Parser
     *  [ES] cleaned grammar parser; instead of 350 shift/reduce and 231
             reduce/reduce conflicts - > 61 & 0 respectively
     *  [ES] MAX() and MIN() renamed to MAXOF() and MINOF()
     !  [ES] removed DX, DY, IMAGE
     !  [ES] removed GRAPHNO *BAR SIZE NUMBER
     !  [ES] removed SETNUM = SETNUM etc
     !  [ES] removed CMAP, STATUS, STATUSBAR, TOOLBAR, LOCATORBAR, LOCATOR

    Defaults
     !  [ES] default page layout changed from free to fixed
     *  [ES] \+ increases font size sqrt(sqrt(2)) times; \- respectively,
             decreases. Sub/superscripts are 1/sqrt(2) of the preceeding font size

    Portability
     *  [AM] implemented dynamic modules for OS/2
     *  [EV] popen() for VMS
     *  [JH/RN] VMS fixes
     *  [AM] OS/2 updates

    Misc
     !  [ES] removed (broke) xwd image loading
     !  [ES] removed all app-defaults not specific to GUI
     !  [ES] \x and \b control sequences removed

    Bug fixes
     *  [ES] "-mono" command line flag now works
     *  [EV] "-wd" command line flag fixed
     *  [EV] trying to create a new set preceded with soft kill of all sets
             caused crash (rep. #367)
     *  [MM] FFT fixes
     *  [MM] when regions were read in from a saved file, they ended up linked
             to all graphs
     *  [MM] in saved projects, REGNUM TRUE was used instead of REGNUM ON
     *  [EV] several sets can be linked to the same file as in xny data (rep. #269)
     *  [ES] crash on mono X servers fixed (rep. #285)
     *  [ES] canvas refresh (rep. #217, #271 #317, #333, #375)
     *  [ES] axis labels were not displayed if `display tick marks' wasn't
             selected (rep. #3)
     *  [ES] coordinates of legend frame now corresponds to the left upper corner
             of the frame (rep. #31)
     *  [ES] ticklabel format was reset by autoscale (rep. #119, #144)
     *  [ES] bounding box of EPS was calculated only approximately (rep. #123,
             #145)
     *  [ES] legend frame didn't account for sub/superscripts (rep. #189)
     *  [ES] extraneous logarithmic tick marks were drawn in some cases (rep. #193)
     *  [ES] accentuated titles weren't centered correctly (rep. #195)
     *  [ES] switch to log scale with an axis containing zero might cause
             error messages infinitely looped (rep. #210)
     *  [ES] filling of legend frame didn't work unless one turned the frame on
             (rep. #215)
     *  [ES] the axes tick marks were behind set curves (rep. #224)
     *  [ES] popup positioning left up to WM for all windows (rep. #273)
     *  [ES] if graph contained too many ticks, autoscale was applied instead
             of tick position recalculation (rep. #275)
     *  [EV] in "Point ops", 'Delete' ignored set number (rep. #293)
     *  [ES] once activated, legends fill frame couldn't be switched off
             from within GUI (rep. #326)
     *  [CM] adding legends to plots with number of data sets exceeding the
             default maximum caused a crash (rep. #344)
     *  [ES] arranging or rearranging graphs by means of the "arrange" dialog reset
             previously set tick properties to defaults (rep. #356)
     *  [ES] user tick labels w/subscripts did not show up in PS output (rep. #383)
     *  [ES] FFT command didn't work correctly in parser (rep. #398)
     *  [HS] command line parsing was wrong in several places (rep. #400)
     *  [ES] misc. small fixes (including rep. #289, #406, #287)

     Legend:

        [EV]  - Ed Vigmond <vigmonde(at-nospam)IGB.UMontreal.CA>
        [RN]  - Rolf Niepraschk <niepraschk(at-nospam)ChbRB.berlin.ptb.de>
        [HS]  - Henrik Seidel <henrik.seidel(at-nospam)gmx.de>
        [JH]  - John Hasstedt <John.Hasstedt(at-nospam)sunysb.edu>
        [AM]  - Alexander Mai <st002279(at-nospam)hrzpub.tu-darmstadt.de>
        [CM]  - Charles Myers <myers(at-nospam)oicinc.com>
        [MM]  - Marcus H. Mendenhall <marcus.h.mendenhall(at-nospam)vanderbilt.edu>
        [HS2] - Heiko R. Selber <selber(at-nospam)fhi-berlin.mpg.de>
        [LM]  - Luc Maisonobe
        [MR]  - Mark Rintoul <rintoul(at-nospam)cs.sandia.gov>
        [HF]  - Harald Freyer <hf(at-nospam)nike.cup.uni-muenchen.de>
        [JB]  - Jesko Brudermann <jbruder(at-nospam)gwdg.de>
        [OT]  - Ovidiu Toader <ovidiut(at-nospam)ostrich.physics.utoronto.ca>
        [RW]  - Robin Williams <Robin.Williams(at-nospam)astro.cf.ac.uk>
        [JM]  - John McKitterick <jbmck(at-nospam)batc.allied.com>
        [AH]  - A. Stewart Hopkins <ahopkins(at-nospam)mail.arc.nasa.gov>
        [KS]  - Keith Stribley <keith(at-nospam)stribley.dabsol.co.uk>
        [DP]  - Donald A. Peterson <donald(at-nospam)nd.edu>
        [WB]  - Wolfgang Braun <braun(at-nospam)pdi-berlin.de>
        [JSB] - J. Scott Berg <jsberg(at-nospam)bnl.gov>
        [AC]  - Alber Chin <china(at-nospam)thewrittenword.com>
        [GJ]  - Gerd Jahn <Gerd.Jahn(at-nospam)dss.dornier.dasa.de>
        [UH]  - Ulrich Harttig <harttigu(at-nospam)ucs.orst.edu>
        [DB]  - Dominique Bissieres <dominique.bissieres(at-nospam)turbomeca.fr>
        [RL]  - R. Lahaye <lahaye(at-nospam)postech.edu>
        [MD]  - Matthias Dillier <Matthias.Dillier(at-nospam)snb.ch>
        [PM]  - Petrie L M <lmp(at-nospam)ornl.gov>
        [JS]  - Jan Schaumann <jschauma(at-nospam)netmeister.org>
        [SR]  - Stewart Rounds <sarounds(at-nospam)usgs.gov>
        [PB]  - Peter Breitenlohner <peb(at-nospam)mppmu.mpg.de>
        [MO]  - Marius Olechnovičius <img(at-nospam)mail.lt>
        [YZ]  - Yura Zotov <yznews(at-nospam)hotbox.ru>
        [TO]  - Tobias Oed <tobias(at-nospam)physics.odu.edu>
        [IG]  - Ionut Georgescu <ionutg(at-nospam)gmail.com>
        [HR]  - Harvey Richardson
        [DC]  - Dan Connelly <djconnel(at-nospam)ieee.org>
        [TK]  - Thomas Klausner
        [SM]  - Stan Maree <stan.maree(at-nospam)bbsrc.ac.uk>
        [ES]  - Evgeny Stambulchik <evgeny(at-nospam)stambulchik.net>

        "!" means no documentation provided (yet)