So you’re trucking along all ready to make your edits to a new image and lo and behold no matter what editing option you click on, Photoshop never changes from the hand tool. Very annoying. Well it seems you’ve been hard at work and sucked up all the memory reserve resources Photoshop has allocated. You need to free these up. Go to Edi > Preferences > Memory & Image Cache then set the cache levels to 4 and 75%. Next, we need to clear out the existing memory cache by going to Edit > Purge > All. This wipes out all of the Photoshop memory and starts you anew. If you keep running into this issue, you might want to think about a memory upgrade for your computer.