How to remove the original photo from the left down corner?

When you process the photo, right before saving it, you have option to slide the photo, and there you have options for photo with original photo at the corner, two photos - original and processed, and option with only processed photo. Exactly at the place where you see your processed photo with original photo in the corner - there you can slide the photo for more options. So just slide and choose which one you want to save.