See whether the balance of the image changes when you give more attention to one side of the frame. Consider how much of your impression comes from the frame itself and how much comes from the subject within it.

A portrait appearing in the gallery series
A portrait presented for closer viewing
A selected portrait in the image collection
A frame from the featured sequence
A gallery portrait organized around a person
A closer look at the portrait
A portrait included in the photo collection
A frame from the gallery