To open the in-app menu on Meta Quest devices
Press the menu button on the left-hand controller, or press the right thumbstick.
To open the in-app menu on Steam VR
The exact button will depend on what headset and controller you're using.
Oculus with SteamVR: Y button
Valve Index: B button
Vive or Mixed Reality: "Up" on the left-hand D-pad
To open the in-app menu on PICO* devices
Press the menu button on the left-hand controller, or press the right thumbstick.
*PICO is only available in select European and APAC markets