I just getting started to using Photos.app because i bought a new camera Ricoh GR. Photos.app is really powerful and strong! after playing with it i got a few questions: 1. The "Levels" section seems so strange to me, it's interface is so different to the other image editing app, for example i want to make a VSCO like film style, how should i start with? 2. Is there a quick way to view the original look so i can compare the adjustments? just like in iOS i can tap&hold the photo to see the original. 3. Can i export the raw file from Photos.app? There are only 3 formats (jpg/tif/png) i can select. Want to hear your thoughts! Thanks!