Box.com has an option that you can edit your document and write on the screen with your stylus pen. You're able to choose a pen or marker, eraser, highlighter, thick/thin, choose your color etc... It allows you to make quick notes, highlight words, circle areas etc.... You doddle, hit save and close. It updates across the board and I'm able to see it on my desktop and other colleagues are able to see my notes as well if it is a shared document.
As a Homebuilder, when you're out in the field and you just want to jot something down on the PDF that you have pulled up. You want to circle where you want that kitchen sink instead of where it is on the house plans, or you want to make a quick note on the plans all while using your stylus pen instead of typing it...
BIG WOW!!
Please add this feature, this is imperative! We are looking to move to Box.com just to be able to do this.