Midi-Action "Skip Forward Preview" not available for midi-controls "rotary" and "knob".

Right now the user is only able to assign the action “Skip Forward Preview” to the control type “button”. Therefor I need two free buttons on my midi-controller, to seek and preview forward or backward a track in the library.

But the control type “rotary” or “knob”, isn’t available.

Can you please make that available?

Thank you.