The changes are very numerous. for the full list of changes in LyX 2.2.x,
refer to http://wiki.lyx.org/LyX/NewInLyX22
Short version of LyX 2.2 user-visible changes:
HiDPI display support
Qt5 support
New text display algorithm
Horizontal scrolling for large insets
New separators and improved control of paragraph breaks
Improved text color support
Improved box dialog
Improvements to tables
Reworked instant preview
Enhanced source panel
Improved outliner and navigation menu
Enhanced language support
New supported languages
New supported LaTeX commands
Layout enhancements
Module enhancements
New preferences settings
New converters
Summary of changelog:
* Native IPA inset and IPA toolbar
* New supported languages
* Tex Fonts Additions
* Basic support for Math OpenType fonts
* Document class categories
* Enhanced support for LaTeX options
* New supported LaTeX commands
* New export command-line option
* Table rotations
* Layout enhancements
* New modules
* Equation Editor "mode"
Ok@ reed
What's new in 2.0 (from upstream):
* Advanced Search Facility
* Spell-checking on the fly
* Compare Documents
* Multilingual Thesaurus
* Refstyle Support
* Multiple Indices
* New backends: XeTeX, LuaTeX, and XHTML
* Better output customization
* Produce output with only selected subdocuments included
* Outliner enhancements
* Document-specific Layout
* New supported LaTeX commands
* Languages, scripts and encodings
* Branches enhancements
* Table features
* Size features
* Progress view and debugging pane
* Color handling
* Instant preview inset
* Forward search for DVI/PDF files
* Optional and Required Arguments
* New (sub)version control features
* Generalized support for LaTeX files preprocessing
** Improved support for Noweb
** Support for Sweave
** Support for LilyPond-Book
Ok@ wiz
maintenance release: "We have fixed crashes that have been reported to us,
ironed out many small glitches, further polished the user interface,
updated the documentation and added some new layouts."
approved by Jeremy C. Reed
"this release irons out all known stability problems with Qt 4.6"
other changes:
-New -f [--force-overwrite] command line flag
-New preference setting for selecting what to do when existing files are
going to be overwritten on export from the GUI
-Detect LyXBlogger if installed
-UI improvements
-doc / translation improvements
-bugfixes
approved by Jeremy C. Reed (the MAINTAINER)
changes:
-fixes for Mac OS X 10.6 (Snow Leopard)
-A number of newly reported crashes were fixed
-new layouts and modules
-Windows support
approved by Jeremy C. Reed
This is version 1.6.4.1. LyX should always be able to
import old document formats.
This now works without a "python" named "python".
(But that needs to be fixed by upstream still.)
Sorry way too many changes to list them here.
I will be removing the lyx-qt, lyx-xforms, and lyx15 packages soon.