The Undo icon shows a counterclockwise curved arrow wrapping around a pale circular fill, ending in a left-pointing arrowhead. Drawn in the duotone style on a 24px grid with a 1px stroke, its colored outline and filled shape stay clear at small sizes. Use it for undo controls, reverting edits, restoring previous versions, and backtracking through workflows. It belongs to Ultimate Duotone - Free set in the Ultimate family.