If you are a desktop user, you are used to deleting a file by dragging it into the trash can. That works for sure. But PicCollage also lets you trash a photo by "flicking" it. It is easy to flick a photo with one finger on a touch screen. Even with a mouse, you can flick by quickly dragging and letting go a photo in any direction; you don't have to flick towards the trash can. Try it and you may like it.