Use borders to frame the page. In PageMaker, you can use the drawing tool to create the border and fill it with a rule from the Elements pull-down menu. White space in the margins also works as a border.
In the 1997 Freestone, we used horizontal rules at the top and bottom of each page and white space along the sides. In a newsletter or magazine, repeating the same border from page to page gives your publication a unified appearance.