If I set a post-capture effect in Preferences such as "Add Drop Shadow to Image", how can I "undo" the shadow once the shot has been taken?
Toggling shadow just adds more shadow. Ctrl-Z doesn't work, so seems like its too late at that point.
If so, possible to make this post-capture option so it can be edited (eg, remove the shadow)? Would be convenient if when taking shots, you want to undo w/o having to go back into Preferences and uncheck it.