-!Important Changes in LyX 2.3.0
+!Important Changes in LyX 2.4.0
!!Interface changes
-LyX now has "inverted" branch insets, which output their contents just in
-case a given branch is not "activated". This makes inclusion of alternate
-material in different versions easier.
+* It is now possible to cancel background export processes. A menu entry
+ to do so will appear on the Document menu when such a process is underway.
+ The LFUN for this is export-cancel. One can also click on the 'spinner'
+ to cancel export.
+* The items on the Edit menu have been reordered, and many of the shortcuts
+ have been changed so that they are more intuitive in the case of often
+ used items. We understand that this may frustrate some users and apologize,
+ while noting that menu shortcuts can always be customized by copying the
+ stdmenus.inc file to the user directory and editing it.
-!!!The following pref variables were added in 2.3:
+!!Documents compilation process and images conversion
-!!!The following pref variables were changed in 2.3:
+* LyX now uses utf8 encoding per default for all languages. This does
+ not affect existing documents. Note that LyX also does not touch
+ personal defaults and templates. That is to say, if you still see
+ traditional encoding preset for new documents, you can change that
+ by selecting "Unicode (utf8) [default]" and hitting "Save as
+ Documents Defaults" afterwards. Your personal templates need to be
+ changed manually if desired.
+* LyX defaults to the "HE8" LaTeX font encoding with Hebrew if the
+ "Culmus" LaTeX fonts are installed.
-!!!The following pref variables are obsoleted in 2.3:
+* Documents that use TeX fonts can only be compiled with XeTeX if the input
+ encoding is set to "utf8-plain" or "ascii".
+
+* DocBook support has been revamped and now targets DocBook 5 (i.e.
+ only XML, SGML is gone). Some supporting files for the previous
+ implementation have been removed: all examples (lib/examples),
+ some layouts (existing documents should still work, but with a
+ DocBook 5 output instead of DocBook 4 SGML). The dependency on
+ sgmltools has been removed, this new support is always enabled.
+ Having sgmltools installed or not will not change anything in LyX.
+!!!The following pref variables were added in 2.4:
-!!!The following new LyX functions have been introduced in 2.3:
+* \ct_additions_underlined true|false: determines whether additions in change tracking
+ are underlined in the workarea (default: true).
-* branch-invert
- Toggles inversion status of branch inset.
+* \ct_markup_copied true|false: determines whether change tracking markup should be
+ preserved on copy/paste (default: false).
-!!!The following LyX functions have been changed in 2.3:
+!!!The following pref variables were changed in 2.4:
-!!!The following LyX documents have been moved in 2.3:
+!!!The following pref variables are obsoleted in 2.4:
-!!!The following metadata files have been added to the tarball in 2.3:
+* \font_encoding
+ The font encoding is now automatically set depending on the document
+ fonts and languages.
+* \use_qimage
+ This is no longer necessary due to the rewrite of the painter.
-!!Changes with respect to external programs and libraries in 2.3:
+* \use_pixmap_cacheqimage
+ There is no evidence that this painting mode was useful anymore.
+* \date_insert_format
+ The function date-insert has been removed and superseded by info-insert date.
+ The latter does not need a pref value anymore.
-!!Known issues in version 2.3.0
+!!!The following new LyX functions have been introduced in 2.4:
-!!Caveats when upgrading from earlier versions to 2.3.x
+* bidi is a helper function to implement icons that are different between LTR and RTL text.
+* buffer-reset-export advises LyX to remove the auxiliary files before doing the next
+ export.
+
+* buffer-write-as-template is a new convenience function to ease saving a document
+ in the (personal) templates folder.
+
+* export-cancel: Used to cancel background export processes.
+
+* ifrelatives is a helper function to check whether a buffer has a master or children.
+
+* master-buffer-forall executes an lfun in the master and all children of a document.
+
+* paragraph-select is a new convenience function to select the paragraph
+ surrounding the actual cursor position.
+
+* tabular-style-insert: Insert a table in a specified style.
+
+
+!!!The following LyX functions have been changed in 2.4:
+
+* set-graphics-group was renamed to graphics-set-group.
+
+* info-insert buffer vcs-*: renamed to info-insert vcs *
+
+* file-insert: optional second parameter "ignorelang" to make the insertion
+ ignore the inserted file's main language (and rather adapt it to the insertion
+ context's language).
+
+
+!!!The following LyX functions have been removed in 2.4:
+
+* date-insert: obsoleted by info-insert date.
+
+!!!The following LyX function has been added and then removed in 2.4 development cycle.
+
+* bidi: used as a first solution to provide icons that change
+ direction with language.
+
+
+!!!The following LyX documents have been moved in 2.4:
+
+* As a result of a major restructuring of the templates and example
+ directories, almost all examples and templates files have been renamed and
+ moved to subfolders that reflect the layout category.
+ The files now have much more decriptive (and longer) names, and they use
+ URL encoding for specific special characters such as '(', ')' and '&'.
+ Notably also the file that opens for new users has been renamed (from
+ splash.lyx to Welcome.lyx).
+
+
+!!!The following new folders have been added to the LyX directory
+
+* The examples and templates directories have been completely re-organized.
+ They are now much more structured (by means of layout categories) and thus
+ consist of many new subfolders.
+
+
+
+!!!The following preferences files have been removed from the tarball in 2.4:
+
+
+
+!!!The following metadata files have been added to the tarball in 2.4:
+
+
+
+!!Changes with respect to external programs and libraries in 2.4:
+
+* The Qt5 libraries are now used by default. In order to link against
+ Qt4 the configure option --disable-qt5 has to be used.
+
+* The dependency on pplatex/dvipost was dropped.
+
+* The dependency on sgmltools was dropped, see DocBook 5 section.
+
+
+!!Known issues in version 2.4.0
+
+* See http://www.lyx.org/trac/wiki/BugTrackerHome
+
+
+!!Caveats when upgrading from earlier versions to 2.4.x
+
+* Autotools monolithic build option for building LyX binaries was removed,
+ for compilation speedup use parallel building on multiple cores instead.
+
+* Several ttf fonts (esint10.ttf, stmary10.ttf, wasy10.ttf) were changed
+ to reflect the fact that newer Qt libraries do not support displaying certain
+ codepoints anymore (bug #8493, #10161).
+ Distribution packagers need to repack those font files in case they are
+ delivering the fonts as a separated package dependent from core LyX
+ in order to display correctly math symbols like \oint.
+
+ Also note, that while it is still possible to compile LyX against Qt 4
+ these math symbols will not be displayed correctly anymore on Qt 4.
+
+!! If upgrading from a LyX version before 2.3.0
+
+* Please additionally see the release notes from the versions in-between:
+ https://wiki.lyx.org/LyX/ReleaseNotes
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