How do I make three columns in Adobe Pagemaker documents?

The minicomputer systems output columns of text on film for paste-up and eventually produced entire pages and signatures of 4, 8, 16 or more pages using imposition software on devices such as the Israeli-made Dolev. The data stream used by these systems to drive page layout on printers and imagesetters led to the development of printer control languages such as Adobe PostScript and Hewlett-Packard's HP PCL.