Many dancers struggle with achieving a nice line of their foot and ankle, and will often do anything to make it better. Unfortunately, many of the things that dancers do to try to improve their pointe range are potentially harmful. This includes things like stretching your feet under a piano, and using any kind of foot stretching device. In my opinion, pushing your body in the direction you want it to go is usually the slowest and most dangerous way of getting there, and this definitely applies when working with pointe range. Forcefully stretching feet usually stretches what is already mobile, rather than targeting the elements that are actually restricting your range, so will often not give you the result you are after.
The following two videos, from our "How to improve your pointe range safely - without a foot stretcher" program, explain how the Windlass Mechanism of the foot works, and why walking in parallel can help improve your range! Understanding how the foot is designed to work in detail can help you make improvements in range in a much simpler and safer way.