Versions, Undo, Rewind, and Branch

Arialine never overwrites diagram history. Every accepted change creates a new numbered version.

Undo this change removes the selected version's change-set while preserving later work when possible.

Rewind to here creates a new latest version identical to the selected historical version. Later versions remain in history but are no longer current.

Branch creates a separate board from the current or selected direction so an alternative can be explored without changing the original. A branch counts as a new board for Free-plan board limits.

Use the board's History action to inspect versions and follow source-message links.