How do I collect and lengthen the canter?

Collecting and lengthening both come down to how rideable the horse is. The best thing is to find a coach who can watch you and your horse in person. Lengthening the canter is about being able to ride the horse forward with good forwardness and a soft contact. Collecting it is generally about asking the horse to wait. I rely mainly on my seat aids. If the horse is keen to push on, it can help to collect the canter by riding it slightly in off the outside leg 🐴