Add a keyboard shortcut or Shortcut intent that allows for the primary display to be mirrored to the attached displays.

[dhnoronha]

In MacOS "Command + F1" can be used to mirror the extended display to the primary display but there isn't an option that would allow for us to do the opposite. Please add a keyboard shortcut or Shortcuts intent that would allow for the primary display to be mirrored to the attached display.

[waydabber]

I can add a feature like that.

Meanwhile there is a CLI command for that, you can easily use this in Shortcuts with betterdisplaycli. Simply add a "Run Shell Script" intent (available under Scripting) and use the mirror command.

Some examples on how to configure mirroring:

Mirrors myDisplay to myDisplay2

betterdisplaycli set -namelike=myDisplay -mirror=on -targetnamelike=myDisplay2

Mirrors myDisplay to myDisplay2 and myDisplay3

betterdisplaycli set -namelike=myDisplay -mirror=on -targetnamelike=myDisplay2,myDisplay3

Turn mirroring off

betterdisplaycli set -namelike=myDisplay -mirror=on -targetnamelike=myDisplay2

Gets mirror state (on or off)

betterdisplaycli get -namelike=myDisplay -mirror

If you want to mirror the primary display, you can use

[dhnoronha]

Oh Great! I hadn't realized that was an option. I'll try that now. Thank you for considering the enhancement.