nircmd has this functionality (haven't tried it myself so no guarantees) https://nircmd.nirsoft.net/setprimarydisplay.html https://nircmd.nirsoft.net/setprimar

nircmd has this functionality (haven't tried it myself so no guarantees) https://nircmd.nirsoft.net/setprimarydisplay.html https://nircmd.nirsoft.net/setprimarydisplay.html It also has a bunch of other useful features like changing the default audio device (something I use every day) and opening the CD tray ;) Anyway, it's the best tool I've used for scripting stuff on windows. No GUI, just a bunch of useful or less useful command line utilities.