[Last modified: Sept 94]

Answer:

New widgets

   ComboBox.
   Notebook.
   Container/IconGadget.
   SpinBox.
   CSText.

New features

   Thermometer Scale and tic marks.
   ScrollBar sliding/arrow and snapback modes.
   ScrolledWindow autoscroll and childType.
   Toggle indeterminate state and new visual.
   Colors in Gadgets.
   XmIm API for I18N.
   XmNlayoutDirection resource everywhere.
   Natural UnitType conversion syntax.
   XPM3 (colored icon) format support.
   The Uniform Transfer Model.
   General Rendition attributes in XmString (color, multiple fonts, etc)
   Several Display resources for CDE visual/behavior compatibility.
   New FileSelectionBox mode (again from CDE).
   Quick navigate in List.
   Oriented PanedWindow.
   Popup menus support.
   and much more...

Extensibility

   Traits.
   C++ foundry.
   Widget writer doc.
   Exm widget source examples.
   Xme API (useful _Xm).

Desktop

   Virtual MWM.
   Workspace Manager.
   TearOff menu in MWM.
   Client Command Interface.
   Colored icon pixmaps (from Xm).

Performance & Quality

   No known Memory Leaks.
   XmString sharing.
   XmList creation/setup speedup.
   GC usage improved.
   Malloc/free usage.
   Bitmap allowed for pixmap resources.
   XmManager no longer blindly selects for PointerMotion
   XmFileSelectionBox better stat cache.
   Broader use of Hash tables.
   Better link profile (Trait + remodularization).
   X11R6 unofficial support.
   Hundreds of bug fixes.