That is automatically achieved if you're On Plane (3rd Imperative) and if your ball/impact bag is placed before Low Point.
I agree. I ran across this recently in the yellow book and it was somewhat of a fog lifter for me:
3-F-7-E - The correct concept of an "On Plane" procedure is driving the club - not "a little downward and a little outward" - but "Down Plane". Down Plane to full extension per 2-C-0 adn 2-L#2.
Also:
2-F - But precision is lost unless Start Up is a Three Dimensional parallel to the Three Dimensional Impact, i.e., the Clubhead moves Backward, Upward and Inward - On Plane - INSTANTLY AND SIMILTANEOUSLY.
The point for me was that the three dimensions must all happen together, in the right rhythm, maitaining lag, and the "feel" is deliberate, positive, heavy (3-F-6) force - On Plane.