When in SYNTH mode, you can double-tap the VOLTAGE CONTROLLED AMPLIFIER section of MS-20 to turn "ZOOM MS-20" on and switch to "CONTROL PANEL." By double-tapping the logo area in the patch section, you can switch to "PATCH PANEL." You can also double-tap to return from "CONTROL PANEL" or "PATCH PANEL."
But it crashes here on non retina ipad mini. Support stuff recommended me to contact local dealer :(