I've never ridden leg yields before but am becoming more familiar with the aids I need to use. My horse has never done any lateral exercises.
Today I introduced him to turn on the forehand and at first he didn't seem to get it but after a few tries he was doing pretty well. I did this to show him that when I apply pressure behind his girth he should move sideways.
So what I want to know is when attempting to leg yield from say the quarter line to the arena edge how will I know he is actually doing it correctly if I have no one there to watch me. What should I look out for on his shoulders, neck, general placement to make sure he's travelling sideways and not just riding a straight diagonal line?
Ideally I would be able to take someone along to watch me but that's not always possible.
Also, any tips for teaching how to leg yield without confusing him to much?