
KNOB (value indicator and setter)

The Knob meter indicates a numeric value and can also be used
to set the value.  To set the value, make sure either the
meter or the interface is in Set mode, and then use the mouse
to turn the knob.   You may find that the Knob is not very useful
for values with wide ranges, because it is hard to set accurately
when the range is very large.

The Knob will indicate your desired value when in Set mode, and
the actual current value when in Monitor mode.

