The undo and redo commands navigate a stack of actions
from a limited set of commands (and
toolbar icons that use
Up to 10 undo/redo actions are remembered.
Other actions/commands cannot be undone, including
label, and many others.
In addition, after a selection change is undone,
using select down or the keyboard down
arrow to navigate the selection cascade
may not work as expected, although undo/redo can still be used to
navigate the previous selection states.
The same stack of actions can be undone/redone using the Edit menu
or the keyboard shortcuts shown in that menu (platform-dependent).
The Edit menu also shows the type of action that would be next undone,
with entries grayed out when no actions are available to undo or redo.
UCSF Resource for Biocomputing, Visualization, and Informatics /