Picture Frame API.

Picture Frame API is a descriptive phrase for digital image composition, not a single standardized interface. It can cover placing an image inside a layout, choosing a crop, adding a mat or border, and exporting a finished graphic. The most useful specification starts with the destination: its dimensions, aspect ratio, background, and required file type. From there, define what may happen to the source picture and which content must remain visible when the layout changes shape.

The reading here helps separate composition rules from format decisions. A border that looks correct in a preview still needs defined pixel geometry, and an attractive transparent composition still needs an intentional background when exported without alpha. The picture and image frame guide covers the broader workflow. Use the articles to write a reusable preset that handles both a wide photograph and a tall image without hidden cropping, accidental stretching, or unpredictable empty space.