Any member of a video call can share their screen with others on the call.
Click on the screen share icon in the Connect toolbar (grey monitor) to bring up a preview of your screen - it will show multiple screens if you have more than one monitor.
Click on the screen you want to share.
A message will appear to confirm that you are sharing your screen.
To end the screen share, click on the blue screenshare icon in the Connect toolbar or hangup the call.