How to undo states in Photoshop
Have you ever found that an hour into a project you really wish you had saved earlier on. You then remember you have the undo state button, but find it only remembers the previous 20 states which is nowhere near enough undo’s. Well I’ve been there too. Today’s tip is one that may save your life. (a bit drastic).
It’s also even better to know you can choose how much undo’s the application can provide. To change your History State settings choose:
MAC : Photoshop > Preferences > General
PC: Edit > Preferences > General
You should now notice that there is a Performance option on the left. You can change the History States in this area. Keep in mind though, if you are setting History States to a large number, you are sacrificing performance. If you find that your system is getting really slow, its worth trying to purge the cache when you start working on a new image.
Undo states in Photoshop
In truth you can have up to 1000 History States, but the more states you have, the more memory required by Photoshop and therefore performance can be effected on the ever hungry for ram Photoshop.
As a rule of thumb. If you only work with small files, then 100 states should be supported with 1GB of total RAM. If you work with images from a multi-megapixel still camera, then those 100 states would slow your 1GB system down.
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