Mark, ...I know what your saying and that's a feature of the video card , ...ie., one window maximized over both screens. The Windows default dual-monitor setup is that, ...wherever a window sits in majority(this screen/ that screen) hitting maximize will only maximize it to that screen. Now, ..both ATI and Nvidia have the features you mentioned (full 2 screen maximize) ....something I find totally unuseful

...but that's irrelevant.
Ludi: yes, ...it does make sense...

For example, ...sometimes I have a 2 instances of Rhino open with one being my main scene and the second I use as a 'workplace". I do this when the main instance is a 'heavy scene' , ...then I can just make objects in the second , a much lighter and quicker instance and copy /paste objects back and forth. This is just a workflow thing, ....and the example is just one of many where having 2 intances of a program can be helpful.
It's kind of an individual thing, ....and I know that people all have their private little methods of utilizing the dual setup that I'm not even aware of.
The only problem for me when doing that, ..is in Rhino we have floating toolbars that can be on either screen, .....so having the program open 2 times, .....suddenly there's a mess of toolbars and it can be quite confusing which toolbar is with which program.

....it's a simple matter of organization though.
