Let me add some clarification to my situation. Let's say I'm planning a flight from KMRN to H34 in AR. But for what ever reason I decide that I'd rather extend my flight plan past H34 and instead substitute the intersection CASKS (18 nm 192 degrees away) to my flight plan. I can't drag the magenta line over CASKS and have it available in iFly as a choice to ad to my flight plan, only the lat/lon of the selected point on the sectional.
Old Pilot - if this is working for you, it's not for me - hence my post.
And the reason we want to do this is that we like to plan our flights in iFly, then duplicate the flight path in our Garmin 430. It's much simpler to add intersections in the Garmin as opposed to lat/lon points.