It's very good for me to know this, really, thank you so much! No one has ever explained this so clearly, and I had quite confused ideas about how I could manage to ask the horse different things! These things should always be explained to the new riders, it's not so easy to understand! :)
For all of the trainers I have met, they are so good with the horses that they just think "canter in a circle" and their body just does all the pieces automatically, and then it is difficult to go and say "What exactly did I do just then, and how can I explain that?" IMO, this is the thing that separates a great teacher from someone who is just OK at teaching.