The White Drawbar Mixer module is a simple stepped attenuator which has 9 slider-switch positions. This correspond to the classic Hammond drawbar attenuation levels:
0: The 'off' position. Slider at the top (fully 'in').
1: -21 dB
2: -18 dB
3: -15 dB
4: -12 dB
5: -9 dB
6: -6 dB
7: -3 dB
8: 'Full volume' or 0 dB. Slider at the bottom (fully 'out').
There is an editable text label (initially "-----") which can be used to differentiate this channel from other drawbars. Just double-click this field to enter your own label text (e.g. " 2 2/3' ")