User's Manual

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ADOBE PHOTOSHOP CS2
User Guide
• You can compare effects easily. For example, you can take a snapshot before and after applying a filter. Then select
the first snapshot, and try the same filter with different settings. Switch between the snapshots to find the settings
you like best.
• With snapshots, you can recover your work easily. When you experiment with a complex technique or apply an
action,takeasnapshot first. If you’re notsatisfied with theresults, youcan select thesnapshottoundoall thesteps.
Note: S
napshots are not saved with the image—closing an image deletes its snapshots. Also, unless you select the Allow
Non-Linear History option, selecting a snapshot and changing the image deletes all of the states currently listed in the
History palette.
To create a snapshot
1 Select a state and do one of the following:
• To automatically create a snapshot, click the New Snapshot button on the History palette, or if Automatically
Create New Snapshot When Saving is selected in the history options, choose New Snapshot from the History
palette menu.
• To set options when creating a snapshot, choose New Snapshot from the History palette menu, or Alt-click
(Windows) or Option-click (Mac OS) the New Snapshot button.
2 Enter the name of the Snapshot in the Name text box.
3 Choose the snapshot contents from the From menu:
Full Document Makes a snapshot of all layers in the image at that state
Merged Layers Makes a snapshot that merges all layers in the image at that state
Current Layer Makes a snapshot of only the currently selected layer at that state
To work with snapshots
❖ Do one of the following:
• To select a snapshot, click the name of the snapshot or drag the slider at the left of the snapshot up or down to a
different snapshot.
• To rename a snapshot, double-click the snapshot and enter a name.
• To delete asnapshot, select thesnapshotand either choose Delete from thepalette menu,click theDeleteicon
or drag the snapshot to the Delete icon.
,
Painting with a state or snapshot of an image
The History Brush tool lets you paint a copy of one image state or snapshot into the current image window. This
tool makes a copy, or sample, of the image and then paints with it.
Forexample,you mightmakeasnapshot of achange youmadewithapainting tool or filter (withthe Full Document
o
ption selected when you create the snapshot). 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 copies from one state or snapshot to another, but only at the same location. In Photoshop,
y
ou can also paint with the Art History Brush tool to create special effects.