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ADOBE PHOTOSHOP CS2
User Guide
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By default, a snapshot of the initial state of the document is displayed at the top of the palette.
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States are added to the bottom of the list. That is, the oldest state is at the top of the list, the most recent one at the
bottom.
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Each state is listed with the name of the tool or command used to change the image.
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By default, when you select a state, the states below it are dimmed. This way you can easily see which changes will
be discarded if you continue working from the selected state.
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By default, selecting a state and then changing the image eliminates all states that come after it.
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If you select a state and then change the image, eliminating the states that came after, you can use the Undo
command to undo the last change and restore the eliminated states.
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By default, deleting a state deletes that state and those that came after it. If you choose the Allow Non-Linear
History option, deleting a state deletes only that state.
To revert to a previous image state
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Do any of the following:
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Click the name of the state.
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Drag the slider
at the left of the state up or down to a different state.
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(Photoshop) Choose Step Forward or Step Backward from the History palette menu or the Edit menu to move to
the next or previous state.
To delete one or more image states in Photoshop
❖
Do one of the following:
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Click the name of the state, and choose Delete from the History palette menu to delete that change and those that
came after it.
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Drag the state to the Delete icon
to delete that change and those that came after it.
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Choose Clear History from the palette menu to delete the list of states from the History palette, without changing
the image. This option doesn’t reduce the amount of memory used by Photoshop.
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Hold down Alt (Windows) or Option (Mac OS), and choose Clear History from the palette menu to purge the list
of states without changing the image. If you get a message that Photoshop is low on memory, purging states is
useful, because the command deletes the states from the Undo buffer and frees up memory. You can’t undo the
Clear History command.
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Choose Edit > Purge > Histories to purge the list of states for all open documents. You can’t undo this action.
To delete all image states in ImageReady
❖
Choose Clear Undo/Redo History from the History palette menu.
Note:
This action cannot be undone.
