o dear how can i explain it??....
i suppose the read circle is you and the stripe is the place of your middle and were you look at.
at the leg yielding pic you look to the horse and you are standing straight i think.
by turning you keep looking forward because thats the way you wanted to go. And only your hips turns towards the horse.
your hand is the second part for the signal which you pull a little towards your body. This combination makes the final to bend your horse in a corner or circle.
its nearly the same by longing at liberty and you wanted that your horse bend on the inside circle and not the outside.
you do your hips towards the horse to make a bend. When you do too much with your hips the horse bend to much. And vise versa.
so as i wrote thats hard working to change from place each time. it is not realy required to do that.
i hope the same over here.....need some dry days and maybe a little bit of sunshine??