Select view point in GH

Hi,
I have a GH definition that produces a frame for me. Is there any shortcut to select and show only one area of a frame in GH without going into the definition. I like to be able to see only the area that is shown in blue.

Are you talking about clip planes? If so:

https://www.grasshopper3d.com/forum/topics/clipping-planes-within-grasshopper