A small position adjustment that does not count as an action. Usually (but not always), a 5-foot step is permitted at any point in the round (such as before or after a full-round action, between attacks in a full attack, between a standard action and a move action, or between two move actions). You can't take a 5-foot step in the same round that you move any distance. You can't take a 5-foot step if your movement is hampered, such as into a square of difficult terrain, in darkness, or when blinded. Taking a 5-foot step does not provoke an attack of opportunity, even if you move out of a threatened square.