Определение и Значение "get the picture"

What is the origin of the idiom "get the picture" and when to use it?

The origin of the idiom "get the picture" is not tied to a specific historical reference, but it draws upon visual imagery as a metaphor for understanding. It is commonly used in conversations, discussions, or explanations where there is a need to confirm comprehension. It can also be used in situations where there is a need to emphasize or clarify a point and to prompt the listener to fully understand the intended meaning.