Adobe Photoshop CS6, User Manual

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Make a snapshot of an image
The Snapshot command lets you make a temporary copy (or snapshot) of any state of the image. The new snapshot is added to the list of
snapshots at the top of the History panel. Selecting a snapshot lets you work from that version of the image.
Snapshots are similar to the states listed in the History panel, but they offer additional advantages:
You can name a snapshot to make it easy to identify.
Snapshots can be stored for an entire work session.
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, take a snapshot first. If
you’re not satisfied with the results, you can select the snapshot to undo all the steps.
Note: Snapshots 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 panel.
Create a snapshot
1. Select a state and do one of the following:
To automatically create a snapshot, click the Create New Snapshot button on the History panel, or if Automatically Create New
Snapshot When Saving is selected in the history options, choose New Snapshot from the History panel menu.
To set options when creating a snapshot, choose New Snapshot from the History panel menu, or Alt-click (Windows) or Option-click
(Mac OS) the Create 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
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 a snapshot, select the snapshot and either choose Delete from the panel menu, click the Delete icon , or drag the snapshot to
the Delete icon.
Paint 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.
For example, you might make a snapshot of a change you made with a painting tool or filter (with the Full Document option 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, you can also paint with the Art
History Brush tool to create special effects.
1. Select the History Brush tool .
2. Do one of the following in the options bar:
Specify the opacity and blending mode.
Choose a brush and set brush options.
3. In the History panel, click the left column of the state or snapshot to be used as the source for the History Brush tool.
4. Drag to paint with the History Brush tool.
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