Full Screen Undo


When I’m working in Full Screen mode, and then exit Full Screen momentarily to check on another program and then return to Full Screen mode, the Undo cache is empty – i.e., I can’t Undo to see what my most recent changes were, something I often do to refresh my memory on the progress. Is this something that can be changed in Preferences, or will there be a different Undo memory in version 2.0?

Thank you,