To expand the page edges so your graph fits on the page, click File | Page Setup. In the Page Setup dialog, click the Paper Size drop-down menu to choose a new paper size. If the desired page size is not listed, choose Custom to enter a new size.
Grapher 13 and earlier versions did not support custom page sizes. Instead, available page sizes were determined by the printer driver. If the desired page size is not available in earlier versions, changing the printer to a PDF print driver, which offers more page size options.
Updated July 22, 2019