Nothing on the projector, or it opens on the wrong screen

Open the projector window, pick the right screen, and check nothing is cleared.

1. 1

   Press D to open the projector window (the screen button at the top right is highlighted when it's open).

2. 2

   Choose the projector in Settings → Display → Projector screen.

3. 3

   Make sure the computer extends the display rather than duplicating it.

4. 4

   If the Live monitor says "Cleared", press B to bring the words back.