You could put a CPlane on the red face…

I prefere Orient / line-line...more possibilities! :)

And what a facility! :)

Cplane does it quite fast but how do I set it to ex. the right side?

I am playing with Blender these days...there is an option ex. to align your camera to view.
Sonething like that could be handy In Moi in the future...select item and align to the desired view.

Tnx.

The CPlane manipulator the “Y” is the front and back direction and the “x” is the left and right

Got it!