Change one thing in a photo you already have, without photo-editing software. In Gemini, upload the picture, open Chat under it, describe the change in plain words, and submit. 1
The model edits the part you described. Check the whole picture before you keep the result, and describe that part again if something drifted. Then download the full-size file: 1K by default, 2K on a Google AI plan. Editing needs a signed-in account and is available to adults 18 and over. 1
The file that comes back carries Google's SynthID watermark, and images from free and Google AI Pro accounts also keep a visible Gemini sparkle mark. 2