"A bird's eye view" (visual definition)

Cf. verbal definitions e.g.
"An overall view, the large picture. The term dates from about 1600 and not only means “panoramic” but also may imply a somewhat superficial picture. Thus a “bird’s-eye view” of music history, for example, may try to cover five hundred years of musical composition in a one-semester course. A 1989 New York Times headline, “Human-Eye View,” announcing a special tour of a natural history museum’s ornithology collection, gave this cliché a new twist."
- The Dictionary of Clichés by Christine Ammer.

https://idioms.thefreedictionary.com/bird%27s-eye+view