I have a dual monitor setup with a 2018 Mac mini running Mojave. The main monitor uses a Thunderbolt 3 connection (Samsung C34J79x) and the second monitor uses DisplayPort (Dell 2412M).
I have the main monitor as the primary monitor. It's all working fine.
When I boot, the login/password prompt is displayed on the secondary machine. And, as this is in portrait mode, I have to log in at an angle. After I log in, it's all good.
I have FileVault enabled.
So, I'd like to have the login display appear on my main (Thunderbolt 3) monitor. Is this possible? If so, how do I go about it?