Bebung... pedal control possible?

Sorry if this is a bit thick, but I am a new user. Where is the ? button and the tooltip for afterouch? I could not find it. And how is the channel aftertouch activated? Thank you.

First, thank you for your information. But I'm afraid you've suggested something I don't really understand. My controller (Kawai VPC1) does not, as I understand the manufacturer's FAQ, have any kind of after touch. But I have no clue what you mean by "use a MIDI CC." The desired ability is to be able to activate the half-vibrato effect, or something similar enough to work as a substitute, almost exclusively on the last notes of phrases, and especially at cadences. But if the controller doesn't do that, I still have no idea how you could make that happen in real time. Thanks again for addressing this rather arcane topic, which undoubtedly is of no interest to most users. But for me, the ability to use the clavichord is important, so if there's a way to do this without ditching a brand new and expensive controller for one that has aftertouch (which I probably wouldn't do anyway), I'd love to know it. Thanks again.

In any case you can at least use the sustain pedal: in the UI, open Options->MIDI, click on Insert (at the bottom), depress once the sustain pedal, click on the bottom left cell (where it is temporarily written Invalid) and select Controller 64,  click on the cell to the right, select Set Paramter and choose Aftertouch. If you went through these steps, the sustain pedal is now triggering the aftertouch. That makes sense at least for the clavichord which is normally not equipped with a sustain pedal.