When you open a page or create a new one, you are working in one of the Page views: Design, Split, Code, and Preview. When a page is open, these views are accessed by buttons at the bottom, as shown here. Note that when you have a page open in Page view, the other Web site views are no longer available at the bottom. (Although they are still available on the View menu or the Web Site tab if you need to switch back to them.)
Design view is the one shown here. This view lets you visually design a page layout, type text, insert pictures, insert hyperlinks, and so on. While you work in the Design view, FrontPage does all of the HTML coding for you behind the scenes.
The Design view is often referred to as the "WYSIWYG" view. WYSIWIG stands for "what you see is what you get," meaning, what you see in the Design view is more or less what the page will look like when it is seen in a Web browser.