How to annotate on a page?
Select the Annotate Tab and first select the text before which you would like to perform the annotation. Then enter the text in the Add Note edit box and press Update button. If you would like to annotate as footnote, check the Add as Footnote checkbox, before pressing the Update button. You will first need to select the text in the browser window, before performing any operations e.g., highlighting, changing the text color etc. Click here for more details.