Export PDF custom page size - missing?

Had an inquiry from my friends at the school who tell their students to export PDF’s out of Rhino for their laser. There is a problem using Export from V8 - there is no way to set a custom page size? The size boxes seem to be missing.

The size boxes are there when one uses Print… Is this a known bug?

@Helvetosaur Thanks, i’ll take a look.

RH-79161