Work with the "History" palette
You can use the History palette to jump to any recent state of the image created during the current working session. Each time you apply a change to an image, the new state of that image is added to the palette.
For example, if you select, paint, and rotate part of an image, each of those states is listed separately in the palette. When you select one of the states, the image reverts to how it looked when that change was first applied. You can then work from that state.
You can also use the History palette to delete image states and, in Photoshop, to create a document from a state or snapshot.
To display the History palette, choose Window > History, or click the History palette tab.
Photoshop
Keep the following in mind when using the History palette:
• Program-wide changes, such as changes to palettes, color settings, actions, and preferences, are not reflected in the
History palette, because they are not changes to a particular image.
• By default, the History palette lists the previous 20 states. You can change the number of remembered states by
setting a preference. Older states are automatically deleted to free more memory for Photoshop. To keep a
particular state throughout your work session, make a snapshot of the state.
• Once you close and reopen the document, all states and snapshots from the last working session are cleared from
the palette.
• By default, a snapshot of the initial state of the document is displayed at the top of the palette.
• States are added to the bottom of the list. That is, the oldest state is at the top of the list, the most recent one at the
bottom.
• Each state is listed with the name of the tool or command used to change the image.
• By default, when you select a state, the states below it are dimmed. This way you can easily see which changes will
be discarded if you continue working from the selected state.
• By default, selecting a state and then changing the image eliminates all states that come after it.
• If you select a state and then change the image, eliminating the states that came after, you can use the Undo.
You can use the History palette to jump to any recent state of the image created during the current working session. Each time you apply a change to an image, the new state of that image is added to the palette.
For example, if you select, paint, and rotate part of an image, each of those states is listed separately in the palette. When you select one of the states, the image reverts to how it looked when that change was first applied. You can then work from that state.
You can also use the History palette to delete image states and, in Photoshop, to create a document from a state or snapshot.
To display the History palette, choose Window > History, or click the History palette tab.
Photoshop
Keep the following in mind when using the History palette:
• Program-wide changes, such as changes to palettes, color settings, actions, and preferences, are not reflected in the
History palette, because they are not changes to a particular image.
• By default, the History palette lists the previous 20 states. You can change the number of remembered states by
setting a preference. Older states are automatically deleted to free more memory for Photoshop. To keep a
particular state throughout your work session, make a snapshot of the state.
• Once you close and reopen the document, all states and snapshots from the last working session are cleared from
the palette.
• By default, a snapshot of the initial state of the document is displayed at the top of the palette.
• States are added to the bottom of the list. That is, the oldest state is at the top of the list, the most recent one at the
bottom.
• Each state is listed with the name of the tool or command used to change the image.
• By default, when you select a state, the states below it are dimmed. This way you can easily see which changes will
be discarded if you continue working from the selected state.
• By default, selecting a state and then changing the image eliminates all states that come after it.
• If you select a state and then change the image, eliminating the states that came after, you can use the Undo.
