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42
Adobe Photoshop Help
Looking at the Work Area
Using Help
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42
Painting with a state or snapshot of an image (Photoshop)
The history brush tool lets you paint a copy of one state or snapshot of an image into the
current image window. This tool makes a copy, or sample, of the image and then paints
with it.
For example, you might make a snapshot of a change you made with a painting tool or
filter. After undoing the change to the image, you could use the history brush tool to
apply the change selectively to areas of the image. Unless you select a merged snapshot,
the history brush tool paints from a layer in the selected state to the same layer in
another state.
The history brush tool works similarly to the clone stamp tool, but on any state or
snapshot of the image, not just the current one. (See
“Cloning and repairing images” on
page 188
.) In Photoshop, you can also paint with the art history brush to create special
effects. (See
“Using the art history brush tool (Photoshop)” on page 226
.)
To paint with a state or snapshot of an image:
1
Select the history brush tool
.
2
Do one of the following in the options bar:
•
Specify the opacity and blending mode. (See
“Setting options for painting and editing
tools” on page 241
.)
•
Choose a brush and set brush options. (See
“Working with brushes” on page 228
.)
3
In the History palette, click the left column of the state or snapshot to use as the source
for the history brush tool.
4
Drag to paint with the history brush tool.
Duplicating images
You can duplicate an entire image (including all layers, layer masks, and channels) into
available memory without saving to disk. In ImageReady, you can also duplicate optimized
versions of an image.
Using duplicates in ImageReady lets you experiment and then compare several
versions of the optimized image to the original.
To duplicate an image (Photoshop):
1
Open the image you want to duplicate.
2
Choose Image > Duplicate.
3
Enter a name for the duplicated image.
4
To duplicate the image without layers, select Duplicate Merged Layers Only.
5
Click OK.
To duplicate an image in Photoshop and automatically append the name “copy” to its
filename, hold down Alt (Windows) or Option (Mac OS) when you choose Image >
Duplicate.
To duplicate an original image (ImageReady):
1
Open the image you want to duplicate.