Cannot resize printout

It seems there are only 2 options to print a scapple diagram: Everything on one page, or original size.
Both of those are pretty useless for a complex drawing! My novel outline is huge, and there are no resizing options. I either print it out on one page, and literally can’t read it even with a magnifying glass, or I print it out in original size and have to decorate a wall with the stupid thing.

Am I missing something?