The Oxygen 49, 61, & 88 keyboards feature “Drawbar Mode” which is intended for use with Organ presets that utilize drawbars.  In this mode, the operation of the sliders is reversed, so that the maximum value (127) is at the bottom and the minimum value (0) is at the top. 

To enable drawbar mode:

1. Press the Advanced button
2. Press the Drawbar key - the LED screen will momentarily display "On"

Drawbar mode becomes active immediately and Advanced mode exits automatically.  Repeat steps 1 and 2 to disable Drawbar mode. The LED screen will momentarily display "OFF"