<r>I've been desperately trying to get a scaled PDF in a large size. I've tried across my Windows, Ubuntu, and Mac system, and none of those are letting me set a custom page size for PDF export. I also tried gabeblack's suggestion above. <br/>
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One thing that mostly worked is the "Export to SVG ...

<r>I'm running into this slowness, and none of the posted suggestions have fixed it for me. 2 other computers (Windows 10 and Mac) in my house can run this program wonderfully, but on my Windows 10 desktop PC, the 3D views are awful. The "awfulness" seems proportional to the number of 3D objects ...