How to Take a Snapshot in Photoshop CS6
In Adobe Photoshop CS 6, snapshots can be useful when making large changes. Snapshots are duplicates of your image at a particular point in time, similar to saving a document with an alternate name to create a copy of that document. (Photoshop automatically names the snapshots Snapshot 1, Snapshot 2, and so on.) However, snapshots are temporary copies, available only during your current work session.
You can use snapshots to alternate between versions of an image when you're making major changes. For example, if you plan to apply several filters and adjustments that will drastically modify your image, you might save a snapshot before you apply the filters and adjustments and then save another snapshot after you apply them. You can then click either snapshot to switch from one version to the other quickly.
The second you close a file, the snapshots you've taken disappear forever.
To take a snapshot, follow these steps:
Select the state at which you want to take a snapshot.
You can select the most recent state that has all your latest editing changes, or you can select an earlier state. Just make sure that you take the snapshot before your desired state is eliminated.
Select New Snapshot from the panel pop-up menu.
You can also click the New Snapshot icon at the bottom of the History panel. Either way, the New Snapshot dialog box opens. Photoshop names your first snapshot Snapshot 1.
In the Name box, enter a name for the snapshot.
Use a name that helps you remember the contents of that particular snapshot.
You can add or change the name of the snapshot later by double-clicking the snapshot name in the history list and typing the new name.
If you like, select a snapshot subtype in the From menu.
Full Document, which is the default, creates a snapshot of all the layers in the image at the currently selected state. This keeps all of your layers separate. You can also take a snapshot of merged layers. This merges all of your layers into a single layer. Finally, you can just snap the Current Layer.
Click OK to create the snapshot.
If you no longer need a snapshot, you can select the snapshot and click the trash can icon, drag the snapshot to the trash can icon, or select Delete from the History panel's options menu.