A burst can contain several almost identical photographs and one small change that matters. A hand relaxes, two people make eye contact or a face moves from an in-between expression to a clear one. Looking only for the sharpest eyelashes can miss that moment. Looking only at expression can preserve a frame whose important subject is unusably blurred. Make the two decisions separately, then bring them together.
Begin by viewing the burst at a size that shows the whole composition. Identify the frames in which the gesture or relationship is most readable. Do not delete anything yet. Mark a small shortlist so that you can compare meaningful alternatives without repeatedly stepping through every exposure.
Compare the relevant differences
Place two shortlisted frames side by side at the same viewing size. Watch the mouth, eyes, hands and posture, but also the relationship between people. One person's strongest expression may coincide with another person's awkward transition. Choose according to the subject of the photograph, not a rule that every face must look directly at the camera.
Check the frame edges next. A promising gesture may be accompanied by a cut-off hand or an object passing behind the head. These differences can be more consequential than a tiny change in smile. If a crop can solve the problem, preview it before assuming that the photograph is saved; the crop may remove another necessary part of the scene.
Only then enlarge the important area to inspect focus and motion. Judge technical quality against the intended output. A slight softness might remain acceptable in a small album, while a large portrait needs closer scrutiny. Do not compare one frame enlarged to its pixels and the other fitted to the screen, because the apparent difference becomes misleading.
Keep the strongest alternative when it tells a different version of the moment. A laughing frame and a quieter one can both have a purpose. Ten frames differing only by a fraction of a head turn usually do not need equal status. Mark the selected image clearly and keep the alternatives grouped beneath it if the application supports that arrangement.
Finish the selection before considering permanent deletion. Confirm that originals and any required backup exist, and understand whether the software's delete command removes a catalogue entry or a file from storage. Selection is reversible; deletion can be a separate, later decision. A good cull reduces the number of images demanding attention without confusing a preferred expression with the only photograph worth preserving.
