Remove annotations in Preview -what is possible vs. what is not
I'm hitting a wall on understanding how useful / useless Preview is for me. Specifically, I need to deal with PDF files that contain annotations that were made in several different programs (e.g. Adobe Acrobat on another computer, PDF Expert on the iPad). Is there any way to edit previous annotations made by these other apps in Preview? I have found several descriptions on how to edit annotations when they are made within Preview, but this situation. I realize that I may not be able to remove special annotations that are available on these other apps and not in Preview, but what about thing like simple line highlights or comments?
Mark
Mac OS X (10.7.4)