I have 4 monitors, but I only which to use 3 in my Eyefinity setup.
In the current driver software v 20.2.2 there is only a quick setup that can't be modified. It puts the monitors all in a row, and no changes can be made.
Older versions (v 18) had an advanced setup which is no longer available.
Could this advance feature please be reinstated? Playing on a single monitor is for people with nVidia cards.