Please can anyone tell me how to undo an adjustment made with the CS4 ACR graduated filter tool.
I can use the tool and edit the graduation but the only way I can undo it is to press the ESC key, which closes the RAW image and so I lose any other adjustments I've made.
I can't find anything in lynda.com (just a tutorial about using the tool and editing the gradients). I can't find anything about undoing it, can't find a keyboard shortcuts other than ESC (which is too drastic if i want to keep the other alterations and edits).
Thanks in anticipation.