Using the Undo History palette

You can use the Undo History palette to revert to a previous state of an image and delete an image's states.


Undo History palette A. Undo History state slider B. History state C. Trash button

To display the Undo History palette:

Choose Window > Undo History, or click the Undo History palette tab.

To revert to a previous state of an image:

Do any of the following:

• Click the name of the state.
• Drag the slider at the left of the state up or down to a different state.
• Click the Step Forward or Step Backward buttons on the shortcuts bar.
• Choose Step Forward or Step Backward from the palette menu or the Edit menu to move to the next or previous state.

To set the keyboard command for Step Forward and Step Backward, in Windows or Mac OS 9.x, choose Edit > Preferences > General, or in Mac OS X, choose Photoshop Elements > Preferences > General, and select an option for Step Back/Fwd.

To delete one or more states of an image:

Do one of the following:

• Click the name of the state, and choose Delete from the Undo History palette menu to delete that change and those that came after it.
• Drag the state to the Trash button to delete that change and those that came after it.
• Choose Clear Undo History from the palette menu to delete the list of states from the Undo History palette, without changing the image. This option doesn't reduce the amount of memory used by Photoshop Elements because it can be undone.
• Hold down Alt (Windows) or Option (Mac OS), and choose Clear Undo History from the palette menu to purge the list of states from the Undo History palette (and from the Undo buffer) without changing the image. If you get a message that Photoshop Elements is low on memory, purging states is useful, since the command frees up memory.

Important: This action cannot be undone.

• Choose Edit > Purge > Histories to purge the list of states from the Undo History palette for all open documents.

Important: This action cannot be undone.