I'm struggling to stretch a program over two monitors.

Windows 11 Pro is the OS.

My primary monitor is 1080 x 1920 in portrait mode and the second monitor is 1080 x 768, positioned above the primary.

The program UCCNC, which is a CNC machine controller. I need to the program to run Full Screen, spanning across the two monitors and I was hoping that DF will do this. The program always opens on the primary screen and if I try to stretch it to the second monitor, it snaps to just this display.

However, I don't know how to set this up in DF.