You can create two types of publications with Microsoft Publisher: print publications and Web publications. When you work on a Web publication, you work in Web
mode. The options available to you in Web mode are tailored specifically to Web publications so that you can create a publication that is optimized for display in a Web browser (browser: Software that interprets HTML files, formats them into Web pages, and displays them. A Web browser, such as Microsoft Internet Explorer, can follow hyperlinks, transfer files, and play sound or video files that are embedded in Web pages.). For this reason, certain text formatting options and other features that are specific to print publications, such as Commercial Printing Tools, are not available in Web
mode.
You can always determine which publication mode you are in by looking at the title bar (title bar: A horizontal bar at the top of a window, dialog box, or toolbar that shows the name of the document, program, or toolbar.) of your open publication, which will display either Print Publication or Web Publication, depending on the publication type.