Maybe this will be closure for you. Exposure is the wrong word.
Exposition (narrative)
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From Wikipedia, the free encyclopedia
For other uses, see Exposition (disambiguation).
Narrative exposition is the insertion of background information within a story or narrative. This information can be about the setting, characters' backstories, prior plot events, historical context, etc.[1] In literature, exposition appears in the form of expository writing embedded within the narrative. Exposition is one of four rhetorical modes (also known as modes of discourse), along with description, persuasion, and narration, as elucidated by Alexander Bain and John Genung.[2]
Exposition was used in the Pentax k1000 manual. 3,000,000 sold no other camera has come close.
background information = asa/iso, artificial lighting, ambient light. ect