Arrow keys move around the grid. Enter taps a step on or off, or presses a row's name, Mute or Solo key. On a lit step, minus and equals make it 10 percent softer or harder (with Shift, 1 percent), and 1 to 9 and 0 set 10 to 100 percent. V turns velocity on and off, and Escape leaves it. In velocity, a lit step is a slider: up and down set it, Page Up and Page Down by 20, Home and End to 1 and 100 percent, and left and right still move along the row. Space plays and stops. Cmd or Ctrl Z undoes. Press / to talk to the agent.