Hiding mixer channels

Is there any way to hide mixer channels? As shown in the enclosed screenshot every instance of a plugin generates ekstra channels (like Trilian B, Trilian C, Trilian D, Trilian E, Trilian F, Trilian G, Trilian H) which I really have no need for.

Also there should be an easy way to show the patches I am using in each plug in when consulting the VST Instrument List.
Dorico VST Instruments.png

There is - new in 2.2. Press the ‘*’ button on the VST rack and it opens the endpoint setup dialog which let’s you control the number of plugin outputs and also shows you which instruments are routed to each

Thanks! Always learning something new in Dorico!