Configure monitors / resolution

$ xrandr

Add Virtual Monitor

$ xrandr <-- will list all minitors and pick one that is not being used
$ xrandr --addmode HDMI-A-0 1920x1080
$ xrandr --output HDMI-A-0 --mode 1920x1080 --left-of eDP

Change resolution

list resolutions

$ xrandr -q

pick resolution

$ xrandr -s <widthxheight>