If you use Photoshop on a regular basis, you might have came across this problem: you lose some important changes within your PSD due to limited undo levels or history states. The problem becomes pain when you don’t have a backup of that PSD document.

Undo levels in Photoshop are the maximum number of History states to retain in the History palette / panel. There are 20 undo levels or history states available by default in Photoshop per document. Rest of this article covers how to increase undo levels in Photoshop in some simple steps.

Increase undo levels / History states in Photoshop

Open Photoshop and go to Edit » Preferences » Performance. The Preferences dialog will come up with Performance options. In the History & Cache section, increase the History states from 20 to a greater amount as you like. Click OK to save changes. Done!

Now, restart Photoshop for changes to take effect. Hope you enjoyed this little yet helpful tip. Also see how to use Masking in Photoshop.