Look for an area that makes more sense in relation to the rest of the frame than it does by itself. Think about whether your eye is guided mainly by contrast, position, or the size of a visible element.

A portrait selected for the featured gallery
One image from the series
A person shown in the portrait selection
An image from the collection
A portrait in the photo series
A still image from the featured gallery
A study of a figure in a portrait frame
A study from the portrait series
A portrait image selected for the collection
A portrait in the featured selection