- Mirror image mode can be turned on and off for each axis using G15.1 and G50.1 codes. G51.1 is used to turn mirror image on and specify the mirroring axis and center, while G50.1 turns it off and specifies the axis. - G68 applies a coordinate rotation to part program coordinates. It specifies the rotation center and angle in degrees. G69 cancels any active rotation. - G16 enters polar coordinate mode where moves are specified as an radius and angle relative to a temporary center point. G15 exits this mode and returns to Cartesian coordinates.