Choose a clear reference
Start with a well-lit JPEG, PNG or WebP under 10 MB. Use the highest-quality version you have permission to upload. A heavily compressed source makes tiny labels and edges harder to evaluate. Select Image to image in the workspace and add one reference photo.
Separate the change from the constraints
Write one sentence for the change and another for what matters. For a background edit: “Replace the background with a clean terracotta studio set. Keep the bottle shape, cap color and camera angle consistent.” Describe the visual outcome rather than a vague instruction such as improve the image.
Make a detail checklist
Compare the original and generated image side by side. Check the subject outline, repeated patterns, labels, facial features and contact shadows. Image editing is generative: areas outside the requested change may also differ. Keep the original file and do not assume pixel-for-pixel preservation.
Refine and save
If the direction is useful, make the next instruction narrower. Ask for a softer shadow or a simpler background. Review the result at the size it will actually be used, then download it. Provider-hosted result links can expire; your local copy is the most reliable archive.