Shared backgrounds: properties that differ across cards?

[David Bovill]

Does anyone have a list of properties of an object that can be part of a
shared background (ie a group with bgbehavior = true), that can vary from
card to card that the background is placed on? From memory I can think of
just a couple:

   1. text in a field with sharedtext = false
   2. hilite of a button with sharedhilite = false
   3. other?