Force a Buffer * argument to math insets constructor

[lyx.git] / UPGRADING

diff --git a/UPGRADING b/UPGRADING
index 1f410ac82a0559565826f22794669416b2e5f48d..15891e74b74482d48ce3d3f0c7b79ff0fa8e3d04 100644 (file)
--- a/UPGRADING
+++ b/UPGRADING
@@ -1,11 +1,45 @@
-How do I upgrade my existing LyX system to version 2.2.x?
+How do I upgrade my existing LyX system to version 2.4.x?

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-* Upgrading from LyX 2.1.x:
+* Upgrading from LyX 2.3.x

 
 

-With LuaTeX, LyX now uses polyglossia instead of babel if the language
-package option "Automatic" is selected. In order to use babel, select
-"Always babel" instead.
+The format of preference and session files has changed. LyX 2.4.x is able to
+read old files but will save them in the new format.
+
+The format of layout files has changed but, as before, layout2layout.py will
+convert older versions to the new format automatically.
+
+* Upgrading from LyX 2.2.x:
+
+The format of preference and session files has changed. LyX 2.3.x is able to
+read old files but will save them in the new format.
+
+The format of layout files has changed but, as before, layout2layout.py will
+convert older versions to the new format automatically.
+
+The external_templates file has been split into one file per template,
+which are now located in lib/xtemplates/*.xtemplate. This makes it easier
+to add new templates or modify existing ones. If you have modified
+the external_templates file, you will have to move the modifications to
+the respective *.xtemplate file manually.
+
+If using TeX fonts and en- and em-dashes are output as font ligatures,
+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.
+
+If trying to compile documents using R scripts and sweave/knitr, LyX
+2.3.x would not allow for re-running the R scripts, unless the user:
+1) explicitly disables the "Forbid use of needauth converters"
+option in the LyX preferences;
+2) provides explicit consent to the use of the converter on the first
+compilation of the R-enhanced document.
+
+* Upgrading from LyX 2.1.x:

 
 The format of preference and session files has changed. LyX 2.2.x is able to
 read old files but will save them in the new format.
 
 The format of preference and session files has changed. LyX 2.2.x is able to
 read old files but will save them in the new format.