GtkMisc::set_alignment
void set_alignment(double xalign, double yalign); 
    
     set_alignment()  sets the
     relative positioning of the calling widget within its container. 
     xalign refers to the relative distance from
     the left edge, and yalign to the
     relative distance from the top edge of the container, with 
     0.0 being no distance from those respective edges
     and 1.0 being no distance from their opposites.