| key | effect | 
|---|---|
| left/right arrow | move character selection | 
| h | mark selected letter as heavy | 
| l | mark selected letter as light | 
| e | toggle elision for selected letter | 
| c | add caesura after selected letter | 
| f | add foot break after selected letter | 
| spacebar | clear weight markings from selected letter, or delete selected caesura/foot break |