Adobe 29180155 - Photoshop Elements 4.0 User Manual page 38

Click the Undo button
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Note: If an operation can't be undone, the command dims.
To cancel an operation, hold down Command and the period key until the operation in progress stops.
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Using the Undo History palette (Editor only)
The Undo History palette (Window > Undo History) lets you jump to any recent state of the image created during
the current work session. Each time you apply a change to pixels in an image, the new state of that image is added to
the Undo History palette.
For example, if you select, paint, and rotate part of an image, each of those states is listed separately in the palette.
You can then select any of the states, and the image reverts to how it looked when that change was first applied. You
can then work from that state.
Actions, such as zooming and scrolling, do not affect pixels in the image and do not appear in the Undo History
palette. Nor do program-wide changes, such as changes to palettes, color settings, and preferences.
A
B
C
The Undo History palette
A. Original state B. State C. Selected state and state slider
Note the following guidelines when using the Undo History palette:
By default, the Undo History palette lists 50 previous states. Older states are automatically deleted to free more
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memory for Photoshop Elements. You can change the number of states displayed in the Undo History palette in
General Preferences. The maximum number of states is 1000.
The original state of the photo is always displayed at the top of the Undo History palette. You can always revert an
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image to its original state by clicking this top state. Clicking the original state is also handy for comparing before
and after versions of your editing.
• When you close and reopen the document, all states from the last working session are cleared from the palette.
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
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bottom.
Each state is listed with the name of the tool or command used to change the image.
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Selecting a state dims those below. This way you can easily see which changes will be discarded if you continue
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working from the selected state.
Selecting a state and then changing the image eliminates all states that came after it. Likewise, deleting a state
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deletes that state and those that came after it.
To revert to the last saved version
When editing a photo in Standard Edit or Quick Fix, you can revert to the last saved version.
Choose Edit > Revert.
O
or the Redo button in the shortcuts bar.
ADOBE PHOTOSHOP ELEMENTS 4.0
User Guide
33