Short answer: Reference images help supported models follow an existing subject, composition, or visual direction.
Steps
Open the image creation flow.
Choose a model that supports image references.
Upload one or more clear reference images.
Write a prompt explaining how the reference should guide the output.
Start the generation and compare the result to your reference.
Notes
Use high-quality references with the subject clearly visible.
For best results, describe what to preserve and what to change.
Supported upload formats can vary by model; PNG and JPEG are the safest options.
Troubleshooting
If an upload fails, try PNG or JPEG and remove very large files.
If the output copies too much from the reference, ask for a new style or composition.