Opening the history section displays the History Browser, enabling access to the available history states.

Once the History Browser is displayed, a list of all applied enhancements will be displayed. Clicking on a state will immediately revert your photo back to that state. You may then either click on another state to revert your photo to another state, or adjust the filter settings. Adjusting the filter settings after reverting back to a previous state will permanently erase any subsequent steps.

Switching to the Split or Side-by-side preview modes, or clicking on the Compare button shows the History State selector.

Clicking and dragging the History State will set the before value for the Compare button, split view, and side-by-side view.

The Last Filtered State button makes it possible to reprocess your photo with all of the filters, control points, and base fill slider settings that were applied to the last photo.