User's Manual

74
ADOBE PHOTOSHOP CS2
User Guide
To 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 astate or snapshot,and choose NewDocumentfromthe Historypalette menu.The historylistfor thenewly
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
ca
n drag each file’s initial snapshot to the original image to access the snapshots again from the original image’s History
palette.
To 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.
Automatically Create New Snapshot When Saving Generates a snapshot every time you save.
Allow Non-Linear History Makes changes to a selected state without deleting the states that come after. Normally,
when you select a state and change the image, all states that come after the selected one are deleted. In this way, the
History palette can display a list of the editing steps in the order that they were made. By recording states in a
nonlinearway,you canselectastate, make achange to theimage,and delete just that state. Thechangeisappended
at the end of the list.
Show New Snapshot Dialog By Default Forces Photoshop to prompt you for snapshot names even when you use
the buttons on the palette.
Making a snapshot of an image
TheSnapshotcommand lets youmakeatemporarycopy(or snapshot)ofany stateofthe image. Thenew 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.
Snapshots are similar to the states listed in the History palette, but they offer additional advantages:
• You can name a snapshot to make it easy to identify.
• Snapshots can be stored for an entire work session.