Hello chimerax developers pannel, 
    Bother to ask, I'm using chimerax to show an arginine forming a Π-cation bond with a phenyl ring, I don't know how to show the center of  the phenyl ring like in pymol. I'm writing the order like this: distance /A:103@NH2  #1.4 and #1.4 is a plane I defined the phenyl ring.  but it just show the distance but can't show the dash. Please tell me how to do. Any help I'm really appreciate. Thanks.
                                                   Leo