I always set the car/truck on it's nose on my work area, then se the toe against a soda can, since it is 90 degrees. If the top(back) if the front tire has a gap from the top of the can, toe out. If the front(Bottom standing up) has a gap, toe in.
This helps you check the setting, as well as loads the front end camber and toe links to get a more accurate reading, since ballcups get sloppy and can effect the settings, even new.
...Almost forgot, you can also spend hundreds on a set up station that takes some time to set up and doesn't compensate for end play in the suspension.
(I have one, in fact it is somewhere in the shop after only using it a couple of times).
...Jim
W.E.D.
www.wedjim.com