Prompting glossary
Aspect ratio
The shape of the image you asked for.
What it means
Aspect ratio is the width to height relationship of a generated image, such as 16:9 for a wide banner or 4:5 for a feed post. Setting it up front avoids awkward crops later.
How to use this in practice
Knowing the word is the easy half. The useful half is writing the instruction so the AI does not have to guess: say who it should act as, give it the background it cannot know, state the outcome you want, set the limits, and name the format the answer should come back in. That is the same structure behind every template in the free prompt library.
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