Adobe PHOTOSHOP 6.0 Manual page 82

CHAPTER 1
72
Looking at the Work Area
Making a snapshot of an image
(Photoshop)
The Snapshot command lets you make a
temporary copy (or snapshot) of any state of the
image. The new 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.
Important: 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.
Snapshots let you do the following:
• Switch repeatedly between several states.
By taking a temporary snapshot of a state, you can
keep that state for the entire work session, even if
the original state is deleted from the list of states in
the History palette.
Give a unique name to states to make them easier
•
to identify.
Experiment more freely. For example, you may
•
want to compare two different techniques for
achieving a similar effect. You can take a snapshot
before and after trying the first technique. You can
then select the first snapshot, try the second
technique on it, and then compare snapshots of
each technique.
Take a snapshot before creating or applying an
•
action. Then you can recover your work more
easily if you decide later you don't like the action.
Each step in an action is added to the list of states
on the History palette. An action with many steps
could scroll the current states off the palette, so
that you could not return to any of them. Using the
Undo command lets you undo only one step and
state. By making a snapshot first, you can select
and redisplay the pre-action image.
To create a snapshot:
Select a state.
1
2 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
3
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
4
text box.
For From, select the snapshot contents:
5
• Full Document to make a snapshot of all layers in
the image at that state.
• Merged Layers to make a snapshot that merges
all layers in the image at that state.
• Current Layer to make a snapshot of only the
currently selected layer at that state.
6 Click OK.
To select a snapshot:
Do any of the following:
• Click the name of the snapshot.
Drag the slider at the left of the snapshot up or
•
down to a different snapshot.