ADOBE PHOTOSHOP ELEMENTS 9

USING PHOTOSHOP ELEMENTS 9
Photoshop Elements workspace
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Undo, redo, and cancel
Undo, redo, or cancel operations
Many operations in both the Organize and Edit workspaces can be undone or redone. For instance, you can restore all
or part of an image to its last saved version. Available memory may limit your ability to use these options.
1 To undo or redo an operation, Choose Edit > Undo or choose Edit > Redo.
2 To cancel an operation, hold down the Esc key until the operation in progress has stopped.
Using the Undo History panel while editing
The Undo History panel (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 panel. You don’t need to save a change in order for the change to appear in the History.
For example, if you select, paint, and rotate part of an image, each of those states is listed separately in the panel. 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 panel.
Nor do program-wide changes, such as changes to panels, color settings, and preferences.
A
B
C
The Undo History panel
A. Original state B. State C. Selected state and state slider
Note the following guidelines when using the Undo History panel:
• By default, the Undo History panel lists 50 previous states. Older states are automatically deleted to free more
memory for Photoshop Elements. You can change the number of states displayed in the Undo History panel in
Performance Preferences (in Windows, Edit > Preferences> Performance; in Mac, Photoshop Elements >
Preferences> Performance). The maximum number of states is 1000.
• The original state of the photo is always displayed at the top of the Undo History panel. You can always revert an
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 panel.
• 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 is at
the bottom.
• Each state is listed with the name of the tool or command used to change the image.
• Selecting a state dims those below. This way you can easily see which changes will be discarded if you continue
working from the selected state.
Last updated 1/27/2011