BoxPress already gives you pop-up control options for Background, Export, and Undertitle. Starting in version 1.7.1, a new set of webpage attributes have come under your control—the webpage’s Frame amenities.

Frame amenities are the navigational and decorative elements on the perimeter of the webpage. Toggling these elements will determine what kind of hypermedia machine you are exporting. For example, a TinderPoint Presentation would do well to remove the Banner, Sidebar, and Footer from all non-special pages. While an academic essay should do without all frame amenities.

To add a frame option, use the $blogFrameOpt pop-up.

• The elements that you can suppress are (in their actual vertical order) navbar, Banner, sidebar, and footer. The respective frame options are NONAVBAR, NOBANNER, NOSIDEBAR, and NOFOOTER.
• To relocate the sidebar to the left-hand side, use SIDEBARLEFT. (This also has the effect of suppressing the About Blurb.)
• To suppress all Frame Amenities, use NOFRAME.

For a montage of samples using different frame options, see here.