:** Highlight: allow users to highlight any text in the document:** Comment: allow users to add a comment against a selected section of the document:** Strikeout: allow users to strike-through against selected text or a section in the document :** Draw:: allow users to draw around selected text or a section in the document, using one of 4 possible colour options :** Delete:: allow users to delete previously added annotations. :** Show Annotations: allows users to show or hide the annotations