Switch to PrintPreview and click the command button 'Fit to One Page' which
although doesn't sound correct, it will actually shrink to two pages.
There are other options such as SelectAll and then adjust the Font settings
to reduce the character spacing by 0.1pt or by reducing the size of the font
in the body text by 0.5pt. You could also fiddle the margins, justification,
line spacing, header/footer size - a whole plethora of choices. It all
depends on the document content and what works best for you.