These parameters define two discrete modulation targets. The modulation intensity, or strength, is assigned to Controller A, Controller B, or both.
On/Off buttons (1 and 2): Turn the controller A and B modulation sources on or off.
Target pop-up menus: Choose the target parameter that you want to modulate with the specified controller. Each target features a two-state button (the label changes in each state).
Continue/Note On buttons: Select either continuous modulation, or a modulation value that is updated only when a note-on message is received.
Amount sliders (1 and 2): Set the amount, or strength, of modulation.