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Chapter 6. Working with the History Palette > Controlling History States

Controlling History States

The History palette is a fantastic tool! It can help you go back in time and correct errors, and even take snapshots of the image, which you can use to create new documents. But all great tools come with a price. The History palettes price is consumption of RAM memory. The more you use the History palette the more RAM memory it needs. If you find Photoshop slowing down on you, or if you get warning message stating that Photoshop is running low on RAM, you might want to try a few things to help gain back some of that lost efficiency. Photoshop lets you choose between 0 and 1,000 History states. That's 1,000 undos, and while that might seem like a great thing to have, History states take up memory. You can also check on your settings. Non-Linear History requires more RAM memory to maintain. If you don't require a non-linear history, then you can turn it off. Since Photoshop uses a lot of RAM memory (64MB just to open), it makes sense that Adobe would give you a way to manage the use of that memory.


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