While you’re on an active Tuple call, you can request that another user shares their screen, or webcam:
This will pop up a share nudge notification on the user’s screen:

When you change someone’s volume, their row in the participant list shows the level you set. Tuple remembers it, so they’re at the same level the next time you’re on a call with them.


Muting a participant
Anyone on the call can select Mute Audio from the participant menu to mute another participant immediately. They see who muted them and can unmute themselves.The menu is available in the webcam window, shared screen toolbar, and in-call popover. See webcam participant controls for the available actions.Adjusting someone’s volume
To make one person louder or quieter, open the … menu next to their name in the in-call popover and drag the Volume slider. You can set it from 0% to 200%. Click Reset to return to 100%.

