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