there is no back button at the time when we explore the image library. If we want to go to back then we have to scroll back till starting point and then back button appears.
I recommend that it should be appeared all the time when we scroll the image library. check attached file.
Default hand has only one pencil. It should be along with pen, rubber and other things in different style. so, we can use it according to our need.
Also there should be some settings for delete and save option. That mean we could turn of delete confirmation option and other as well.
Hope it will helpful for everyone.