# View all available options for all monitors
xrandr -q 
 
# List all monitors
xrandr --listmonitors 
 
# Change Resolution of Monitor
xrandr --output <monitor-name> --mode <resolution>
 
# Disable a Monitor
xrandr --output <monitor-name> --off 

Flags
--rate refresh-rate: Specify Refresh Rate for Monitor
--brightness 0.25: Change Brightness of Display (Range : 0 to 1)
--primary: Specify Primary Monitor
--left-of <monitor-name>: Specify Position of Secondary Monitor wrt Main Monitor
--right-of <monitor-name>: Specify Position of Secondary Monitor wrt Main Monitor