Seems that there is a great number of ways to segment a screenplay.

Act - classically a script is broken into 3 Acts. The more modern script appears to favour 4 Acts.

Sequence - I'm not 100% sure about this one, but it seems logical that it is a collection of scenes that resolves an issue or action within a scene. A car chase sequence could have many scenes across locations with dialogue mixed with action. The most sequences i've seen in a described structure is 16 - 4 Acts * 4 scenes in each. That is 6 or so pages per sequence. Too much.

Segment? Sub-sequence? Subset? Scenario? Block? Phase? I'm feeling that this identity needs to be slotted in. So for instance the "Set-up sequence" in pages 1-10 would include segments where we meet our protagonist, we meet their friends, some obscured scenes of the antagonist and a segment building to the "call to adventure". These would be anywhere from 1/2 page to 2-3 pages max.

Scene - A location and a time. An important unit for a director as it identifies new lighting and camera set-up requirements.

Now i'm looking for a bite size segment to focus on. Scenes can be just too small, pages are too arbitrary. Segments are probably what I am looking for.

Anyway, you probably have no idea what I am rambling on about. And that's how I want to keep you for the time being. Everything will become clear in good time.

So in the mean time go learn structure from: UNK - Screenwriting Structure

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