Ok, here is a related example.
I want a construction line in 3D space. Nothing exotic, about 5 in. long, let’s say parallel to a main axis but elevated in z. On this line, I want to establish a number of perpendicular planes with each plane having a certain cross section centered on the construction line. This would the way one would loft an aircraft fuselage but in my case it is for a contoured knife handle.
So I extruded a cube and put a construction line on a top edge and set up a number of planes on this line.
The problem is when I 2x tap a plane to go ortho to draw a cross section, I cannot locate the line. I assumed your planes to be a fixed size so I drew the Big X to locate the line. But this is not very elegant.
In any of intersection with the planes the line is a point. Any way to make this point visible in the plane ortho projection? This would be very helpful.