-* If the "Use non-TeX fonts" and "Don't use ligatures for en- and em-dashes"
- document preferences are not checked, when exporting documents containing
- en- and em-dashes to the format of LyX 2.0 or earlier, the following line
- has to be manually added to the unicodesymbols file of that LyX version:<br>
- 0x200b "\\hspace{0pt}" "" "" "" "" # ZERO WIDTH SPACE<br>
- This avoids "uncodable character" issues if the document is actually
- loaded by that LyX version. LyX 2.1 and later versions already have the
- necessary definition in their unicodesymbols file.
+
+
+!!!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.
+
+
+
+!!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.
+
+!! 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
+
+* 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.