anchor
right_anchor new as of aiSee 3.0left_anchor new as of aiSee 3.0arrowcolorarrowsizearrowstyle new values as of aiSee 2.2backarrowcolorbackarrowsizebackarrowstyle new values as of aiSee 2.2classcolorfontname as of aiSee 2.1.88horizontal_orderlabellinestyleprioritysourcetargettextcolorthickness