1) In the Mac and Cheese episode, when Chandler is attempting to write on the Magna-doodle (whatever it is) and slips up because Monica opens the door, pay attention to the red lever at the bottom of the Magna-doodle.

2) After writing, it is two inches from the right.

3) When Chandler says "All her, she hates you", it's all to the left.

4) When Joey says "What are you talking about, the audition isn't until 5", it's all to the right.