Pedal (hardware/software) question

Just realized, PTQ has no less than 10 different pedals als an option.
But how to control them with what hardware?
Usually a digital piano has 1, 2 or, at maximum 3 pedals.
OK, I could always reassign the 10 pedals to the 1 to 3 existing pedals,
but there should be an easier way to get them available.

AFAIK, only the Sustain pedal is continuous/progressive,
all the other pedals are just on/off switches, right?

So maybe I could use any MIDI (foot) switches, to control the on/off 9 pedals ?
(while of course having my ordinary sustain pedal already equipped with any keyboard)
I already saw, I can assign a MIDI event to an pedal by right-clicking.
But can I assign all 10 types of pedals at once (provided I have 10 MIDI (foot-)switches available)
or only 4 at once, that are shown in the user interface?