fairmeeting can also be operated using the keyboard:
F - Show or hide thumbnails
M - Mute or unmute microphone
V - Start or stop camera
A - Adjust quality
C - Open or close chat
D - Switch between sharing camera and screen
R - Raise or lower hand
S - Toggle full screen on or off
W - Toggle tiled view on or off
? - Show or hide keyboard shortcuts
SPACE - Push to talk
T - Show speaker statistics
0 - Focus on your own video image
1-9 - Focus on another person's video image
If everyone else disables their video stream, only the speaker and sign language interpreter remain visible. Written interpretation can easily be carried out in the chat window.