PDFescape...typing, highlighting, etc. on PDF documents

Mr. Peters had asked for a way to annotate on documents...  PDFescape is a great resource for typing/drawing/highlighting/placing sticky notes, etc. on a PDF on your MacBook. There are several apps available for mobile devices, including one we are looking at purchasing called Notability.  By signing up for a free account, you can share, save, and print documents as well as view files online.  Use it as a way for students to fill in templates or forms, digital worksheets, etc.