M-text.
Optional change in the position (in the unit of pixel) along the X-axis before the M-text is drawn.
Pointer to a face object. Each property of the face, if not Mnil, overrides the same property of face(s) specified as a text property in <mt>.
Pointer to a draw control object. The M-text <mt> is drawn by mdraw_text_with_control() with this control object.