DxNothing in layout - FXViewer creation

[mbox_bob]

That is probably a result of your Window Layout. I imagine you did not originally start with a Stacked Screen Window Layout and instead modified one of a different type.

Select your Window Layout, then the Regions node, and then the Swap Groups tab. Change the Reset Region and set to <NO REGION>. This way all regions will use their native resolution, rather than attempt to use the RESET REGION as the render resolution and scale that to their display size.

Or I guess you could do what you have done... which has the same end result.