Mari 4.5v2 docs:

Snapshots Palette

The Snapshots palette and the controls that can be found on it are described in the table below. When controls also bring up additional dialogs, these are referenced for more information.

What It Does

The Snapshots palette displays:

• a list of snapshots for the entire project or currently selected channel

• buttons to take, revert, or delete channel snapshots

• information about snapshots, such as name, when they were created and by what user.

Snapshots Palette Fields

Control	Type	What it does	Opens this dialog box	Notes
Channels > All	button	Displays a list of all snapshots in the project.
Channels > Current	button	Displays a list of snapshots for the currently selected channel.
Created	info	The date and time when the snapshot was taken.
Preview	thumbnail	A thumbnail preview of the snapshot.
Name	info	The name of the snapshot.
User	info	The name of the user that created the snapshot.
	button	Takes a new snapshot. Depending on whether Channels > All, or Channels > Current is selected, this button behaves differently. If All is selected, a snapshot is taken for all channels in a project. If Current is selected, a snapshot is only taken for the current channel.	Snapshot All Channels. Snapshot Channel.
	button	Extracts the snapshot into a new channel in the Channels palette and populates the Layers palette with the layers of the snapshot.	Extract Snapshot	This option is only available when the Channels > Current button is active.
	button	Loads the selected snapshot.
	button	Deletes the selected snapshot.	Delete Snapshot