Free form pencil is horrible at writing on a document with a stylus like it was paper. I have a Surface Pro 3 and the stylus works great until you start using it on a PDF file in Acrobat XI Pro. Please make this an add on at least. Also, make the menu hide or allow full screen with the stylus remaining as input. Not allowing full screen is very frustrating. I can imagine this would be useful to anyone with a tablet and stylus regardless of maker. Students, Lawyers, Doctors, Nurses...so many professions could benefit from this. If this is already a feature, besides using the aforementioned and useless Free Form Pencil from the commenting menu, please let me know, I have not been able to find it.
Microsoft Surface Pro 3
Windows 8.1
Acrobat XI