Try the Print preview or the Page setup buttons to explore the printing options.
You can setup the printing options to fit the graph on exactly one page, as below:
You can also choose how to divide the graph on multiple pages. The number of horizontal and vertical pages can be chosen independently.
Finally, when using multiple pages, you can choose to make the part of the graph on each page to fit its page like above, not keeping the aspect ratio, or to keep it. In the latter case, the pages will not be filled.
You can change the size of pages and the margins:
You can also change the font, headers and footers: