Glossary

Narrative is also called action.  It's what a character does, moves, etc.

An example would be:

Judd moves to the door, waiting, dreading the moment when Casey will walk in.

A slugline is the scene heading in a script.  Either term is acceptable.

An example of a slugline is:

INT.  CLASSROOM - NIGHT

A transition is a line or word that describes movement between scenes.

For example:

DISSOLVE TO:, CUT TO:, HARD CUT TO:

Transitions are placed on the far right margin on a line by themselves.  These days, transitions are used much.

V.O. means VOICE OVER.  It is used to modify the speaker.

For example:

MANNY (V.O.)
I knew I was in trouble as soon as I met him.  He was bad - you could smell it on him.

A voice over narrator is not seen although it could be one of characters in the film.  The narrator of "STAND BY ME" is an example of a person who isn't directly seen in the movie although his younger self is.