Adobe photoshop cs2 User 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, 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 palette. 
To create a snapshot 
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. 
Enter the name of the Snapshot in the Name text box. 
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 
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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 palette  menu, click  the Delete icon  
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. 
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.