Xyz coordinates relative to cplane?

Is it possible to quickly list the x,y,z coordinates of a point in relation to a cplane?
I already know about coordinate dimensions and setting the zero point but im looking for something like the ‘what’ command but uses cplane instead or world
for instance:
point at world 15,20,5
cplane at 10,20,10

point is 5,0,-5 to cplane

found it. “analyze” tab -> “point” gives both world and cplane