"Graphic is key"

Key Light

A key light is the primary light on a subject. It is generally off-center and angeled. It is designed to selectively illuminate prominent features on the subject to create shadows or depth. It is the main source of light in a 3-point lighting setup.

"Marker"

Slate

A slate is the digital board held in front of the camera that identifies the camera person, director, shot number, and title. There is also the take number, and the slate operator will say “mark” before clapping. This is for sound sync purposes

"Sequence"

Shot, Scene, and Sequence

Shot, Scene, and Sequence are concepts that make up the dramatic narrative of a film. Scenes are made up of shots while sequences are made up of scenes. Films are comprised of entire sequences.

"Legend"

An inscription or title on an object

"When does a map become a guide? "

When it's a screenplay

"Map provides picture."

Screenplay (map) provides the guide for the movie

"Think direction. Think full picture."

Director + movie

"Who controls the narrative? "

Director

"What is a spell?"

Entertainment

Q has also said the map is the key the i.e. map/screenplay being light or revealing "dark to light"

I think I may be on to something. It's a movie