Hi Andreas,

re:
> can I make the view orthogonal to the surfaces
> that I have marked with the red arrows in the image?

Yes as Phiro writes above you can use the Construction Plane (View > CPlane) function to do that.

Snap the orientation picker onto the center point of those planes that you are indicating and then the ortho Top/Front/Right views will be oriented around that local frame of reference. So after you set the CPlane when you draw in the Top view you'll be drawing on that plane.

When you're done use the "Reset CPlane" button inside the View > CPlane command, or also you can right click on View > CPlane as a shortcut to resetting it back to world orientation.

- Michael