In character studio, the three most used coordinate spaces are world, object and body space. These are often used to control the biped hands and feet. Another coordinate system are the footstep gizmos themselves—a foot on a footstep is in the coordinate space of the footstep. If the footstep is moved the foot moves also. Bear in mind that a sliding footstep is a footstep that moves relative to the coordinate system of the corresponding footstep gizmo.