You turn the glasses frame upside down (by the eyebrows, that is, the upper edge of the glasses frame) and put it on the platform to press the legs of the glasses. If it is uneven, gently twist and adjust the connection part between the two eye rims (called the beam in the line) until the frame is stable, then put it back on the platform, and adjust the connection part between the ear bend or the eye rim and the leg until the frame is stable.