I use use explicit render dimensions. I much prefer this. My screen size or shape becomes a non-factor then. These get recorded with the scene, so moving from one Poser to another doesn't change it.

I do test renders, say at 600x400 for speed. When I am ready to see it larger, I press Shift-Alt-D, change the 600 to 1200, the 400 automatically changes to 800 (same aspect ratio). Hit enter and render.

 

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)