TRANSITIONS: CUT TO, FADE OUT, DISSOLVE TO and so on are called Transitions-- they tell us how you intend to take us from one scene to the next. Transitions go on their own line, and usually start around 6½ inches from the left edge of the page. Many transitions are part of the story telling-- "DISSOLVE TO" and "MATCH CUT TO"  have very specific meanings in visual language. "CUT TO:" isn't really used much any more; the best reason to put it into your scripts is so that, if you're asked to write extra scenes while keeping the overall length down, you can take them out and gain a couple of pages without anybody noticing.