Thanks Brundlefly for your quick reply.
I know the keyboard is sending CC1 with modwheel (it shows it on the display) and the plugin itself is responding to the movement by actually changing the sound as I am playing, but I don't know how to record this. When I enable write automation on the track it doesnt record anything by itself. I can still hear it "live" when trying to record it, but the automation doesn't store/record.
I cannot see MIDI or anything similar to that in my edit filtr (see the picture). When I tried to add the volume envelope and change it's CC, I don't know how, the rightclick sets the type of envelope, but not really it's options. Edit filtr shows the vst64plugin I am using and there are maybe 20 things I can automate, but not the thing I need.
Automation pic Edit: Thanks to other thread I managed to convert the CC data into envelope - even if loosing the CC data - the envelope is just a line. But it doesn't stay in the edit filtr data options after I select "notes", edit some notes and want to select the enevlope again. Ahh...