Required 

ga: 

Applications must remember the state of each window or dialog box (expanded or not expanded) independently (not collectively). The state should be changed only by the user and should always be preserved until explicitly altered by the user. 

Recommended 

gb: 

Applications should remember the state of each expandable window or dialog box across sessions, so that users don't have to manually configure the expandable windows each time the application is run. 

If appropriate, applications can provide a mechanism to allow users to set the state of an expandable window on a global basis in the application. This would be part of the application's Options.