On this website there are multiple ways to annotate. Highlights, annotating (highlighting text + commenting) page notes (commenting without highlighting) and replies to annotations and page notes. Once it is active on a webpage, annotation can begin. Once you have selected a text to annotate an annotation box will appear in the menu on your right. To highlight or add annotation to a text, simply select the text and the icons of whichever action you would like to do will appear.