my idea
I tried to use "SetViewRange" to get "View Range" in "Plan Region", but "Plan Region" is not "View Plane", only "ViewPlane" can use "SetViewRange" method, so this idea failed.
There is a parameter named "View Range" in the "Parameter" of the "Plane Region", and the "offset value" I want is not found in the parameter "View Range",so this idea failed.