PDF reader is very easy to use. Just head over to its main page and click on the button to upload your PDF and once uploaded use the tool bar provided to select whether you want to annotate , add text, highlight text, change text colour, add background colour, or simply add a hyperlink. You can do all and many more for free and at the instant of a click.
Related: List of Educational PDF Tools
Watch the video below to learn how to use PDF Reader