I'm not sure, but it sounds to me like you're saying you want a way to designate the Excel window "always on top". I've seen some help-related windows with that option—they're always-on-top by default but you can turn that feature off (and I always do). But if there's a way to turn it on for just any window, it probably is a function of Windows, not of Excel. If anyone here knows how to do that, I'd be interested myself, though I probably won't use it much.