Highlights provide focal points in a document. They are particularly useful for presentations and Web documents, where they make it easy for users to pick out the main points of the document at a glance.
To highlight an area of the page:
Click the Highlight Area button on the toolbar.
Point to the upper-left corner of the area you want to highlight, hold down the left mouse button, drag the mouse to draw a rectangle over the area, and then release the mouse button.
In the Highlight Area Properties dialog box that appears, select the settings you want for the highlight’s appearance and behavior, and click OK.
For more information about defining highlight appearance and behavior, see Defining properties of hyperlinks and highlights.