When the Discussion toolbar is visible, any comments in the current document or Web page appear as embedded note markers. You can start two different types of discussions, depending on the file type:
In Word documents only, you can carry on inline discussions relating to a specific paragraph, table, or graphic. Click the Discussions button and choose Insert in the Document; Word adds a comment marker at the point where you clicked and opens the Enter Discussion Text dialog box (see Figure 10.9). Enter a subject and the message text, and click OK to save the comment to the discussion server.
In Word documents, Excel workbooks, PowerPoint slides, and Web pages, you may add discussions about the document, workbook, slide, or page itself. Click the Discussions button and choose Insert About the <file type> to display the Enter Discussion Text dialog box and add this sort of comment.