> For the complete documentation index, see [llms.txt](https://ai-photo-editor.gitbook.io/ai-photo-editor-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-photo-editor.gitbook.io/ai-photo-editor-docs/task-guides/canvas-extension.md).

# canvas extension

Specify the destination or intended aspect ratio. Inspect generated regions for perspective, lighting, repeated patterns, and continuity with the source.