1
Choose a clear face reference
Pick an image where the source face is visible and not heavily obscured. A similar head angle and expression may help the replacement look more coherent; a tiny or blurred reference gives less useful detail.
2
Choose the target portrait
Identify the photo whose pose, clothing, and surroundings you want to retain. Tell the editor which image is the reference and which is the target so their roles are not confused.
3
Inspect the finished frame
Check the hairline, eyes, jaw, shadows, and edges at normal size and close up. A plausible thumbnail can still reveal mismatched lighting or distorted features when enlarged.