| Space | Play or pause |
| N P | Next or previous problem (plays from just before it) |
| J K | Next or previous call |
| ← → | Back or forward 1 s (Shift: 5 s) |
| + − 0 | Zoom in, zoom out, whole call |
| 1 2 3 | Hear both sides, only the caller, only the agent |
| T | Light or dark |
| ? | This help |