+ When the user closes the last view on a document, close the
+ document as well ("yes"), or hide the document ("no"), or ask
+ the user ("ask").
+
+- \\completion_minlength
+ Defines the minimal length of a word to be added to the list of
+ words for text completion.
+
+- \\default_length_unit
+ Defines the default length unit: 2 for centimers, 6 for inches.
+
+- \\default_otf_view_format
+ Defines the default output format for documents with non-tex
+ fonts (OpenType fonts).
+
+- \\texinputs_prefix
+ Defines the prefix for the TEXINPUTS environment variable. A
+ single '.' in the paths will get replaced with the current
+ document dir and also non-absolute paths will be prefixed with
+ that dir.
+
+ The default semantics of TEXINPUTS apply, such that, for example,
+ if a path is terminated with a double slash, all subdirectories
+ will also be searched by both the TeX engine and ancillary programs
+ such as dvi previewers or dvips.
+
+ (see also commit 1717ef20)
+
+- \\use_qimage
+ See Caveats section below.
+
+- \\use_system_theme_icons
+ If set to true, LyX tries to use the theme icons as defined by
+ the OS.
+
+
+The following pref variables were changed in 2.1:
+
+- \\mac_like_word_movement -> \\mac_like_cursor_movement
+ When this option is set, the cursor is now moved to the end of
+ the current paragraph on paragraph-down. The pref variable was
+ renamed to better reflect this new behaviour.
+