Sometimes I'll notice in a game that I'm the squad leader. What advantages do I get from being squad leader though? I've never seen a way to mark objectives or anything like that
As the squad leader, you can set objectives by sighting in a target and pressing the 'back' button (left of the guide button). (You receive additional points when those orders are executed.) The easiest example would be in a game of Conquest. Point yourself at a capture point on hit the Select button. (Xbox) You can also set WayPoints, and at some point the Squad Leader can call in artillery strikes. I'm sure there are additional commands, and other methods based on the platform that you are playing on.