Enter a digit in the active cell and move to the next cell.
Backspace
Clear the active cell and move to the previous cell.
Del
Clear the active cell and move to the next cell.
Arrow keys
Move focus between cells.
Space
Same as Right Arrow.
Advanced shortcuts
Tab
When both row and column separators are set, this jumps to the next box's upper-left cell. With Vertical input step enabled, the next box is below; otherwise, it is to the right.
P
(P)lus. Shift the active cell and all following cells one step right.
M
(M)inus. Clear the active cell and shift all following cells one step left.
F
(F)orward. Same as P but only for the current row.
B
(B)ack. Same as M but only for the current row.
N
(N)ext empty. Focus the first empty cell after the cursor.
R
P(R)evious empty. Focus the first empty cell before the cursor.