Adobe 23101335 User Guide - Page 82
Making a snapshot of an image, Photoshop, or if Automatically Create New Snapshot When
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72 CHAPTER 1 Looking at the Work Area Making a snapshot of an image (Photoshop) 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 palette. Selecting a snapshot lets you work from that version of the image. Important: 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 palette. Snapshots let you do the following: • Switch repeatedly between several states. By taking a temporary snapshot of a state, you can keep that state for the entire work session, even if the original state is deleted from the list of states in the History palette. • Give a unique name to states to make them easier to identify. • Experiment more freely. For example, you may want to compare two different techniques for achieving a similar effect. You can take a snapshot before and after trying the first technique. You can then select the first snapshot, try the second technique on it, and then compare snapshots of each technique. • Take a snapshot before creating or applying an action. Then you can recover your work more easily if you decide later you don't like the action. Each step in an action is added to the list of states on the History palette. An action with many steps could scroll the current states off the palette, so that you could not return to any of them. Using the Undo command lets you undo only one step and state. By making a snapshot first, you can select and redisplay the pre-action image. To create a snapshot: 1 Select a state. 2 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. 3 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. 4 Enter the name of the Snapshot in the Name text box. 5 For From, select the snapshot contents: • Full Document to make a snapshot of all layers in the image at that state. • Merged Layers to make a snapshot that merges all layers in the image at that state. • Current Layer to make a snapshot of only the currently selected layer at that state. 6 Click OK. To select a snapshot: Do any of the following: • Click the name of the snapshot. • Drag the slider at the left of the snapshot up or down to a different snapshot.