Preferences - Webcam
To open your preferences, click the your avatar at the bottom left of the Tuple popover and select Settings from the dropdown:
You can also use the keyboard shortcut cmd + , to bring up the menu.
Then select the Webcam tab:
Which device Tuple should use by default when sharing your webcam video.
This is the resolution for webcam video shared while you are pairing. Setting the resolution will automatically change the resolution on any current and future calls.
If you have a high-speed connection and want maximum webcam quality, set this higher. If you're working with a relatively poor connection, set your preference to a lower resolution to reduce latency on the call.
When in a call:
Enable my webcam automatically
When this setting is on, Tuple will automatically share your webcam video when you join or start a call.
Show preview before sharing
If selected, Tuple will ask you to confirm a preview of your webcam before sharing. If deselected, clicking the "Share Webcam" button will share your webcam immediately.