Think about which visual detail you would point out to someone seeing the portrait for the first time. Consider what changes when you shift your attention from the subject to the arrangement of the whole picture.

A study of a figure in a portrait frame
A frame for comparing first impressions
A study of a person through portraiture
A frame to linger over
A portrait from the featured image sequence
From this set of portraits
A person in a portrait image
An individual frame from the gallery
A portrait from this series of images
A frame to view in context