Space plays and stops. Synth: click a line to add a dot (up to 3), drag to move, double-click a dot to remove it, × deletes the row, the row number mutes it. Drums: click a lane to add a hit, drag to move, click a hit to remove it. Knobs: drag up or down, Shift for fine moves, double-click to reset. Export .mid puts the synth on channel 1 and each drum lane on its own channel, so FL Studio can split them; with Sequence on it exports the whole sequence.