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Setting History Palette Options
Working with the History palette requires a firm understanding of how the palette functions, and what you can and cannot do with History. The History palette records your steps as you work through a document. A step is defined as a specific action, such as creating a layer, or adding a brush stroke. Every time you perform an action, a step is recorded in the History palette. The History palette gives you the ability to go back to a previous history state, which is the same as performing an undo command. You can perform multiple undo commands up to the number set in Photoshop preferences for the History States. In addition, the History palette creates snapshots of the document. Snapshots are images of the current state of the document. Snapshots are used in conjunction with the History and Art History Brushes to create special effects.
Set Number of History States
Click the Edit (Win), or Photoshop (Mac) menu, point to Preferences , and then click General .
Enter a value from 0 to 1000 for the number of steps recorded in the History States box.
Click OK .[View full size image]
Did You Know?You can duplicate a History State. Hold down the Alt (Win) or Option (Mac) key, and then click the History State you want to duplicate. |
For Your InformationPerforming Multiple Undos The History palette represents the ability to perform multiple undo commands as many as you choose for your History States. However when you press Ctrl+Z (Win), or  (Mac) you only move back and forth between the last command, just like a normal undo. To perform multiple undo commands press Ctrl+Shift+Z (Win) or  (Mac) to move forward through all your History steps, or press Alt+Shift+Z (Win) or Option+Shift+Z (Mac) to move backwards through the available History steps. |
Set History Options
- Select the History palette.
- Click the History Options button, and then click History Options .
- Select the check boxes for the History Options you want to use:
Automatically Create First Snapshot.
Creates a snapshot (image) when the document first opens.
Automatically Create New Snapshot When Saving.
Creates a snapshot every time you save the document.This is useful for keeping track of the changes made to a document.
Allow Non-Linear History.
Allows you to operate History in a non-linear state.
Show New Snapshot Dialog By Default.
Opens a dialog box with options each time you create a new snapshot.
Make Layer Visibility Changes Undoable.
Instructs Photoshop to make changes made to a layer's visibility undoable (
).
Click OK .
