The controls affect the way incoming MIDI Continuous Controllers (CCs) behave, both their range of control and in some cases, the type of control.
(general group)
Exp MWh (Exponential Modulation) Changes the Mod Wheel behaviour to an exponential form.
ModWh (Modulation Wheel) The control range of the Mod Wheel.
Exp BW (Exponential Bandwidth) Changes the Bandwidth behaviour to an exponential form.
BWDpth (Bandwidth Range) The control range of incoming bandwidth messages.
PWheel Rng The control range of the Pitch Wheel (double arrows are x10).
PanWdth The control range of incoming Panning messages.
FltQ The control range of incoming Filter Q messages.
FltCut The control range of incoming Filter Cutoff messages.
Vol Rng (Volume Range) The control range of incoming volume messages.
Breath Enable Breath control.
Expr Enable Expression control.
FMamp Enable FM Amplitude control.
Vol Enable Volume control.
Sustain Enable the Sustain pedal.
(Resonance)
CFdpth The control range of incoming Center Frequency messages.
BWdpth The control range of incoming Bandwidth messages.
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(Portamento)
Rcv Enable Portamento control.
Thresh The minimum or maximum (depending on th.type) difference between notes for portamento to start or finish.
Prp.Rate The distance required before changing from non-proportional to proportional (if enabled).
Proprt Enable proportional Portamento.
time Portamento sweep time.
t.dn/up Portamento up/down time ratio.
th.type Portamanto type (whether 'up to' or 'starting from').
Prp.Dpth The amount Proportional diverges from non-proportional portamento.
These are five of the most commonly used CCs sent by external systems. This window not only tracks their current positions (so you can see when they are being changed) but you can also directly set the values from here. Additionally the controls can be MIDI-learned.
As an example a foot pedal can be diverted to change the filter cutoff setting instead, or even as well as changing volume.