(BagginsBill)> Quote - Also, what is the reason you care so much what the document window size is? Is it because you render to the document window size?

...Or I care about size and aspect ratio approximately, and so a click to choose one of 1x1, 3x2, 4x3, 7x5, 16x9, and then a click for overall size [100, 200, 300, 400, etc.] seems to work quite nicely for me. The last click is a portrait or landscape radio button, but that doesn't change often.

Aspect ratio is my concern, so that I see what the camera will frame (even though I realize that the constrain aspect letterboxing is available) .  the top row of three UI radio buttons are all set to 16:9 in various sizes, all floating.  During initial setup I have a wide library, and several other control panels open, so the doc window is relatively small.  When doing final tweaks, I have a very large doc window with few control panels open.

The middle row of UI buttons are set to square for producing library thumbnails and avatars.

The bottom row changes with the need of the moment for a current project.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5