In the process of scripting, a writer mixes relevant background information into characters’ dialogues in such a way that readers are neither bored nor frustrated. Writers, instead of explaining things directly, should incorporate exposition through interactions between characters which include; disagreement, hidden meaning, and setting that provides particular details.
The plot may require that during the course of events, a character can remember incidents, provide information that is useful for reference purposes or simply indicate the why of his/her behavior without affecting its progress. This way, the necessary information reaches the audience without breaking the story’s flow, while keeping the dialogue lively and genuine.
Through effectively combining expository writing together with character-building endeavors and storyline advancements, clarity and depth can be achieved by authors without sacrificing the dialogue’s natural rhythm.
Check the following 2 videos. First Video is by Writing Chops where they explain in short – 90 seconds about “Dialogue Exposition”. Second video is by Raising the Stakes where they explain about “9 Rules For Good Exposition”.