Easily switch between "duplicate" and "extend" mode for your projector
On your keyboard, hold the Windows key (⊞) and press the P key to cycle through display modes:
- PC screen only: monitor on, projector off
- Duplicate: show the same desktop on monitor and projector
- Extend: show different desktops on monitor and projector
- Second screen only: monitor off, projector on
When the desired mode is selected, release the Windows key.
Please refer to this Apple support document: https://support.apple.com/en-us/HT202351