I have noticed there appears to be a bug (in Poser 7, at least) where the red outline doesn't go away when the cursor is outside of the preview window. I'm gonna use the above fix so that I don't run into it, because the only other fix I'd found for it was to restart Poser.. :>

 

Currently using Poser Pro 2012 (Display Units = feet)

AMD Phenom II 3.2ghz (6 cores)

8gb RAM

Windows 10 Pro 64bit