I created a 2" x 8" rectangle that I want to print in portrait mode. It’s in parallel projection and is the only geometry in the model:
When I click on “Print Preview…” I can set the SketchUp-to-printer ratio to be 1" = 1":
Note that it says that the image is 15.688" x 8.421053" … when I click “OK”, I get two sheets with half of the geometry on each:
This apparently includes the whitespace on each side. When I resize the main SketchUp window:
The “Print Preview…” now shows this:
And the output result is now this:
Which is what I wanted in the first place.