Aside from Filter Cutoff, Resonance, Volume and Distortion which are hardcoded potentiometers.
There are 4 so called "Soft-Knobs" giving you access to all the parameters of a single module you selected.
So for example to edit Oscillator2 you press the hardcoded button "OSC2". The display will now show the properties of osc 2 which spread over 4 pages accessible via the soft buttons below the display. Each Page for the osc contains 4 values being altered by the aforementioned soft-knobs.
So essentially when creating a patch you will use the same 4 knobs over and over with different properties selected.