if you install the Diigo toolbar, or toolbar button, you have the ability to highlight text and pictures in a variety of colors, or add sticky notes to a bookmarked page. With this feature you can annotate web pages with thoughts, ideas or additional information. All these notes are saved for the next time you access the saved bookmark, and anyone else you share the bookmark with, (students or teachers), will also see your annotations. It is a great way to focus attention on a large article.