What is the purpose of the all caps format in scene headings?

The all caps format in scene headings serves primarily to easily identify scenes within a screenplay. This typographical choice ensures clarity and quick readability, allowing anyone involved in the production—such as directors, cinematographers, and production assistants—to quickly locate and reference specific scenes. The use of all caps helps differentiate scene headings from the rest of the text, making it clear where a new scene begins and providing crucial information about the location and time of day.

The other options relate to different aspects of screenplay formatting. For example, drawing attention to action is more about the description that follows the scene heading, while character introductions typically utilize different formatting conventions, such as capitalizing character names when they first appear in dialogue. Similarly, dialogue follows a distinct format that does not involve all caps. Thus, the all caps format's primary function is scene identification, distinguishing it clearly from other screenplay elements.