A Practice Note discussing motions to alter or amend a judgment under Federal Rule of Civil Procedure (FRCP) 59(e) (sometimes called motions for reconsideration). This Note explains when a judgment may be altered or amended under FRCP 59(e), what a motion to alter or amend a judgment must specify, who can move to alter or amend a judgment, when the motion must be filed, and grounds for the motion. This Note also discusses how to draft, serve, and file the motion, opposition, and any reply, and appeals after entry of an order disposing of the motion.