Adobe 13102498 User Guide - Page 60

PHOTOSHOP CS3 53 User Guide • By default, deleting a state deletes that state and those that came after it. If you choose the Allow Non-Linear History option, deleting a state deletes only that state. Revert to a previous image state ❖ Do any of the following: • Click the name of the state. • Choose Step Forward or Step Backward from the History palette menu or the Edit menu to move to the next or previous state. Delete one or more image states ❖ Do one of the following: • Click the name of the state, and choose Delete from the History palette menu to delete that change and those that came after it. • Drag the state to the Delete icon to delete that change and those that came after it. • Choose Clear History from the palette menu to delete the list of states from the History palette, without changing the image. This option doesn't reduce the amount of memory used by Photoshop. • Hold down Alt (Windows) or Option (Mac OS), and choose Clear History from the palette menu to purge the list of states without changing the image. If you get a message that Photoshop is low on memory, purging states is useful, because the command deletes the states from the Undo buffer and frees up memory. You can't undo the Clear History command. • Choose Edit > Purge > Histories to purge the list of states for all open documents. You can't undo this action. Create or replace a document with an image state ❖ Do one of the following: • Drag a state or snapshot onto the New Document button . The history list for the newly created document will be empty. • Select a state or snapshot, and click the New Document button. The history list for the newly created document will be empty. • Select a state or snapshot, and choose New Document from the History palette menu. The history list for the newly created document will be empty. • Drag a state onto an existing document. To save one or more snapshots or image states for use in a later editing session, create a new file for each state you save, and save each in a separate file. When you reopen your original file, plan to open the other saved files also. You can drag each file's initial snapshot to the original image to access the snapshots again from the original image's History palette. Set history options You can specify the maximum number of items to include in the History palette and set other options to customize the palette. 1 Choose History Options from the History palette menu. 2 Select an option: Automatically Create First Snapshot Automatically creates a snapshot of the initial state of the image when the document is opened.