This section contains the history of all your activities in the order you have performed them. Each state in the “Activities” section represents a separate “image”. As in working with an “image” you can return the image to the fixed state or restore certain areas by ticking the checkboxes to the left of the operation’s name. This allows selecting and switching off an operation the result of which you didn’t like. To undo the last action please press the “Undo” button.