Hi folks.
Dont forget that one of SU strength is the possibility of orbiting, zooming, panning, changing scene while in the middle of an operation like drawing, scaling, moving, rotating, etc.
Try the following:
1 - With the standard Iso view, start a rectangle
by clicking to set the first corner.
The rectangle will have a tendency to be drawn
on the horizontal plane (red-green axis).
2 - While still in the drawing process, orbit so
the red-blue plane is mostly facing you.
3 - Complete the rectangle. You will see that it
is now drawn on the vertical red-blue plane.
Just ideas.