1
Choose the strongest source
Find the original camera file or highest-quality scan available. Enlarging a tiny copy first does not restore information, and repeated saves may add compression artifacts.
2
Describe the clarity goal
Open the linked image workflow and ask for a restrained improvement to the specific soft area. If the tool accepts your image, follow its on-screen directions rather than assuming a particular control or export format.
3
Inspect and keep the original
Compare faces, lettering, textures, and straight edges at full size. Keep the original alongside any result so you can spot altered features or decide that a fresh photo is more useful.