Changing the primary monitor in Linux Mint (and other distributions)

*** Update: To persist this change between machine restarts, see this post ***


1) Save this script as monitor-switcher.sh:

 #!/bin/bash  
 # Author: Andrew Martin  
 # Credit: http://ubuntuforums.org/showthread.php?t=1309247  
 echo "Enter the primary display from the following:"               # prompt for the display  
 xrandr --prop | grep "[^dis]connected" | cut --delimiter=" " -f1     # query connected monitors  
 read choice                                        # read the users's choice of monitor  
 xrandr --output $choice --primary                         # set the primary monitor  

2) Make executable with:

 chmod +x monitor-switcher.sh  

3) Execute by typing:

 ./monitor-switcher.sh  

4) Enter the name of the monitor you want to be the primary monitor.


All credit to the article here.