| 1-9 | Select a number | |
| Space/Shift-Space | Insert number/pencil mark | |
| p or P | Insert just pencil marks | |
| Arrow Keys | Navigate puzzle | |
| Tab/Shift Tab | Next/Previous empty cell | |
| a/A | Assist this cell/all cells | |
| option A | Autopencil marks | |
| l/L | Lock cells (to begin blank puzzle) | |
| h/H | Highlight incorrect answers |