Perhaps you might find the following, brought to my attention by member "AncestorSearchin", to be both an interesting and eye-appealing alternative...
♥ John Paul Jones
You can add a ♥ by holding down your "alt" key and the number "3" key on your "numberpad" or "numkey" on the right side of your keyboard or select another character of choice...http://www.tedmontgomery.com/tutorial/altchrc.html
This is, IMHO, as simple and unobtrusive a means of highlighting a "direct line" that I've yet to see. The "characters" are also recognized in FTM 2012 (and I'll assume onward).