I just hit the Undo button a few too many times and have erased a few frames of the tutorial. Why cant have you have the thumbtack give the option to either "save as is" or "revert to original"... Even your most esteemed competition which issues a FREE app has that feature. Plus I bought both versions of Sketches, am a little disappointed at the price point... Should be an upgrade instead of a whole new app, WITH A PRICE THAT REFLECTS THAT! Version one of Sketches is getting flushed off of my iPhone.