I've imported a hand-drawn map into Acrobat Pro and want to edit it by deleting hand-written lines and boxes. I was hoping to just "erase" what I don't need with my pen. I saw a You Tube on how to do this and the entire screen of Acrobat Pro is different than mine. I can't isolate specific areas of the map to work on. I'm on a 7-day free trial to see f I want to purchase this.