Correcting Mistakes - Adobe 13101332 - Photoshop - Mac User Manual

Adobe Photoshop Help
Using Help | Contents
To automatically resize the window when zooming in or out using keyboard
shortcuts (Photoshop):
1 Do one of the following:
In Windows or Mac OS 9.x, choose Edit > Preferences > General.
•
In Mac OS X, choose Photoshop > Preferences > General.
•
2 Select Keyboard Zoom Resizes Windows.

Correcting mistakes

Most operations can be undone if you make a mistake. Alternatively, you can restore all or
part of an image to its last saved version. But available memory may limit your ability to
use these options.
For information on how to restore your image to how it looked at any point in the current
work session, see "Reverting to a previous version of an image" on page
To undo the last operation:
Choose Edit > Undo.
If an operation can't be undone, the command is dimmed and changes to Can't Undo.
To redo the last operation:
Choose Edit > Redo.
You can set the Redo keystroke preference to be the same for Photoshop and
ImageReady. In the General section of the Preferences dialog box, select a preference
for the Redo key. You can also set the key to toggle between Undo and Redo.
To free memory used by the Undo command, the History palette, or the Clipboard
(Photoshop):
Choose Edit > Purge, and choose the item type or buffer you want to clear. If already
empty, the item type or buffer is dimmed.
Important: The Purge command permanently clears from memory the operation stored
by the command or buffer; it cannot be undone. For example, choosing Edit > Purge >
Histories deletes all history states from the History palette. Use the Purge command when
the amount of information held in memory is so large that Photoshop's performance is
noticeably diminished.
To revert to the last saved version:
Choose File > Revert.
Note: Revert is added as a history state in the History palette and can be undone.
To restore part of an image to its previously saved version (Photoshop):
Do one of the following:
Use the history brush tool
•
palette. (See "Painting with a state or snapshot of an image (Photoshop)" on page
Use the eraser tool
•
tool" on page 224.)
Using Help | Contents
| Index
to paint with the selected state or snapshot on the History
with the Erase to History option selected. (See
| Index
Looking at the Work Area
Back 37
38.
42.)
"Using the eraser
Back 37