Thu May 27, 2021 10:09 pm
Hi, I know this is an extremely late reply but I would just like to share my solution for anyone who ends up stumbling across this.
I assume we are all on Mac here since the OP is using cmd F.
You have to switch your secondary display to your primary display in your Mac display settings.
System Preferences->Displays->Gather Windows... then drag the white bar from your laptop monitor to your secondary monitor.
After that go into Davinci and revert your primary display to your laptop (for me it was labeled Color LCD)
Workspace->Primary Display->Color LCD.
Davinci now thinks the secondary monitor is your primary monitor and will open the full screen display on the secondary monitor with cmd F.