Get NavMeshAgent to look where it's going

I have set up a NavMeshAgent on my enemy character that is following a set path. Currently though he turns as he moves which in some cases looks more natural but if the enemy is just walking back and forth it just looks like he is walking backward for a large part of the path which looks less natural. Is there a way to control the rotation within the agent or to set the agent to only move when its angle is within x degrees of forward?