By remembering where the original master photo is stored on your computer, and remembering all edits performed, the Xara Picture Editor offers the seemingly magic ability to undo earlier changes to processed photos.
Say you've altered the brightness of a photo and saved the result. If you load this in the future you can undo the brightness change. This does not take the saved image and alter the brightness (that would result in cumulative distortion). Instead it re-creates a new image, identical to the one just loaded, from the original master. Perfect copies every time, plus the ability to alter or undo any edit.
Try this with any other photo editing software:
With the Xara Picture Editor you can do this.