Hold the tire lever firmly in your hands and look for the boundary between the tire and the wheel rim. Apply great force to the lever until you pry the rim and the tire apart.

You can do this step anywhere along the circumference of the wheel.

With the tip of the lever inserted between the rim and the tire, rotate the lever 90° counterclockwise and fix the lever to the metal spokes using the arrow shaped slot located on the top of the lever.