This interactive mockup demonstrates how the Original pop-up tab could function.
Clicking the tab displays a thumbnail showing the original state of the photo, which users could click on to reset the photo.
To the right of the thumbnail is a sub-tab for the Undo/Redo flyout menu. Click it to reveal thumbnails for each of the Undo/Redo states, with more recent states on the left and earlier states extending to the right.
The current state is highlighted in purple. Clicking on a thumbnail selects that Undo/Redo state and applies it to the photo. Thumbnails to the left of the current state are Redo states, thumbnails to the right are Undo states.
The status bar below the thumbnails shows the name of the current Undo state, along with Undo and Redo buttons that can also be used to navigate the states. The Revert button cancels any changes made within the tab and resets the photo to the state it was in before the tab was opened.