Why do ballet dancers point their feet when they leave the floor?

In ballet, whenever a dancer's foot is not flat on the floor, it is pointed. This technique is fundamental to the aesthetic of the genre, as the pointed toe serves to extend the visual line of the leg, particularly when the leg is raised in the air, such as in an arabesque.1

Beyond enhancing the dancer's physical line, pointing the feet is part of the broader stylistic emphasis on verticality and an aerial quality in movement. By pointing the toes, dancers maintain a fluid, graceful appearance that helps conceal the physical effort required to perform jumps and other virtuosic steps. This practice contributes to the overall impression of lightness and control that characterizes ballet as a theatrical art form.1