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Chapter 8: Editing
dobe Photoshop lets you edit and modify
selections and layers of images in many
ways. (For information on how to make
selections, see Chapter 7, “Selecting.”) This chap-ter
describes the editing tools and techniques,
including how to move, copy, and paste selections,
how to use the eraser tool, the smudge tool, the
blur/sharpen tool, the dodge/burn/sponge tool,
and the type tool, and how to apply special effects
to a selected area.
Keep in mind that pixels can exist beyond the visi-ble
canvas when you drag or paste a selection onto
a layer, apply a transformation, or create artwork
or type. You can move the pixels back onto the vis-ible
canvas using the move tool or selection arrow,
modify or reposition the pixels using the Free
Transform or any of the Transform commands, or
increase the canvas size to incorporate the pixels
without discarding them. But as long as the pixels
are beyond the visible canvas, you cannot paint or
modify them (for example, using filters or the Lev-els
command).
Indicating when tasks finish
The Beep When Done preference setting causes
Adobe Photoshop to sound a beep whenever the
program finishes performing a task requiring a
progress bar. After the beep, you can continue
working with the program.
To set the beep:
1 Choose File > Preferences > General.
2 Select Beep When Done, and click OK.
Interrupting operations
When trying to cancel an operation in progress
(when Adobe Photoshop displays a progress bar),
press Command+[.] (Macintosh) or hold down
Esc until the operation in progress has stopped
(Windows).
Correcting a mistake
You don’t need to be overly concerned about mak-ing
mistakes while using the Adobe Photoshop
program. Most operations can be undone using
the Undo command.
In some cases, the information held in memory by
the Undo command, Clipboard, Pattern buffer, or
Snapshot buffer can be so large that it prevents
Photoshop from performing the next operation.
The Purge command clears the operation stored
by the Undo command, the Clipboard, or the Pat-tern
or Snapshot buffer to free up memory, pre-venting
you from undoing an operation or reap-plying
the information held on the Clipboard or in
the buffers.
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CHAPTER 8 174
Editing
To undo the last performed operation only:
Choose Edit > Undo.
If an operation can’t be undone, the Undo choice
is dimmed and reads “Can’t Undo.”
To free memory used by the Undo command, by the
Clipboard, or by the Pattern or Snapshot buffer:
Choose Edit > Purge, and choose the command or
buffer you want to clear. If the command or buffer
is empty, the command appears dimmed.
You cannot undo the Purge command.
Restoring an image
You can undo a series of operations that you have
performed by restoring all or part of an image to
its last saved version.
To reverse all changes made to the image since it was
last saved:
Choose File > Revert, and click Revert.
To restore part of an image to its previously saved
version:
Do one of the following: Use the rubber stamp tool with the From Saved
option selected in its Options palette. For more
information, see “Using the rubber stamp tool” on
page 188. If you took a snapshot of the image using the
Edit > Take Snapshot command, use the rubber
stamp tool with the From Snapshot option
selected in its Options palette. For more informa-tion,
see “Using the rubber stamp tool” on
page 188. Use the eraser tool with the Erase to Saved
option selected in its Options palette. For more
information, see “Using the eraser tool” on
page 202. Select the area you want to restore and choose
Edit > Fill. For Use, choose Saved, and click OK.
For more information, see “Filling a selection or
layer” on page 215.
Duplicating images
You can copy an entire image (including all layers,
layer masks, and channels) into the available
memory on your system without saving the image
to disk by using the Duplicate command or by
dragging and dropping. Duplicating is useful
when you want to experiment with different
effects on an image without permanently changing
it. For example, you can duplicate an image, mod-ify
it, and then compare the results to the original.
To duplicate an image using the Duplicate command:
1 Open the image you want to duplicate.
2 Choose Image > Duplicate.
3 Enter a name for the duplicate image.
175
4 To duplicate the image without layers, select
Merged Layers Only.
5 Click OK.
To duplicate an image without naming
it, hold down Option (Macintosh) or Alt
(Windows) as you choose Image > Duplicate.
Moving selections
You move a selection by dragging it to a new loca-tion
using the move tool. When the Info palette is
open, you can track the exact distance you are
moving a selection.
When you move a selection, Photoshop creates a
temporary layer called a floating selection, which
appears in the Layers palette. When you deselect
the selection, its contents become part of the
underlying layer.
Selection moved; floating Selection deselected; contents
selection in Layers palette merged with background
To convert a floating selection to a layer,
drag the floating selection in the Layers pal-ette
to the New Layer button (O) at the bot-tom
of the palette.
To move a selection:
1 Select the move tool ( )in the toolbox.
To activate the move tool when any other tool is
selected (except the pen, direct-selection, add-anchor-
point, delete-anchor-point, and convert-anchor-
point tools), hold down Command (Mac-intosh)
or Ctrl (Windows).
2 Move the pointer inside the selection border,
and drag the selection to the position you want. If
you have selected multiple areas, all move as you
drag.
Original selection Moving selection with
move tool
Using rulers, guides, and grids
Photoshop includes rulers, guides, and grids to
help you align artwork. Guides and grids help you
align elements precisely across the width or length
of a Photoshop image. The grid is useful for laying
out images or elements symmetrically.
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