No way to activate effects on input channel ??

I would like to direct monitor with the compressor on that should be available for monitoring on the inputs.

Looking at p 28 in the UR 28 manuel shows a small vertical rectangle in the hardware part of the mixer, move this rectangle to tell cubase where in the chain to apply the effect.

I cant access the effect because I dont have that rectangle in my GUI and cant seem to get it to appear.

What am I missing?


zoom on mixer was set too narrow to see that controller, zoom out and I can see it.