PDF Notes is the most convenient app to annotate PDF docs in the Windows Store!
Using this app, you can easily add text notes, highlight an important things by choosing a pen or draw geometric figures in PDF docs. Can change the color of outline and fill of added figures and text, and also move them on the document. After editing and saving, all documents will be available in PDF format.
PDF Notes solves a lot of difficulties related to work with PDF files on Windows devices. And even if you don’t use PDF format regularly, be sure that PDF Notes will no doubt be useful to you.
See screen shots of the app below: