This is used if MS Edit is selected. This works fine with Netscape-Composer. Usually RAD page stores encapsulated pages so that they can be immediately edited with the HTML editor. So as long as you select the right type of editor when creating a page editing works out fine. However before another type of editor can be used the encapsulation mode of a page must be changed by selecting the body component in RAD page and selecting the new editor type.
Some editors can directly read and edit pages from the Internet.
In this case use the Page Mode Selector of RAD page to display a page with the right encapsulation. The press edit in your browser or save the page source to file. Note that RAD page automatically determines if a page is requested from the FrontPage editor, so it is possible to directly use the edit key in Internet Explorer.