This is my preferred desktop arrangement, but I can only maintain it if 'Activate all displays' is selected in Nvidia control panel. If I want to utilize both GPU's, and select 'Span displays with Surround,' the taskbar can only be snapped to outer edges of the displays, even when the surround display is split into three in DisplayFusion. If I could keep surround vision on and position the taskbar vertically in the center display using DisplayFusion, I would be eternally grateful! Can it be done?

Thanks for your reply! I didn't think it was possible either, but then I read this discussion in which someone says they managed to do what I'm trying to do after following your solution. Would it have been the DisplayFusion taskbar, and not the windows taskbar, positioned vertically in the centre virtual display? Or having taskbars on all three virtual displays and hiding two of them?