Review title of Laura'sSolid and useful software - needs tweaking

I find the simple format and the ability to draw over a graphic, and then clear it useful. It would be helpful to know what the ideal size or aspect ratio of the graphic file should be. What's the difference between 'reset' and 'clear' buttons? How do the presets work? Custom shapes other than x's and o's would be great, especially if there was a way to know exactly how large they were. Email address on website doesn't work. Undo function for last action would be great. So would adding text and straight lines or dimensioning. Check out Photo Measure and Reshape apps...