Home » Tip of The Day » Purge Photoshop MemoryPurge Photoshop Memory November 1, 2015. Posted in: Tip Of The Day. To delete all the Photoshop memory off your RAM (from Undo, Clipboard, and History), go to the Edit menu, select Purge and select the item you want to purge. If you select All, it wipe out everything off your RAM. « Previous Photoshop Tip: | Next Photoshop Tip: » Sign-up for the PTC Newsletter so that you'll never miss a tutorial!. Your Email Address: