Try giving equal attention to the part of the image that seems least prominent. Notice whether the image invites you to concentrate on one area or lets your attention move around the frame.

An image in the portrait gallery
A portrait selected for display
A portrait to examine from edge to edge
A frame worth revisiting
A portrait with attention to how the subject is placed
One of the images selected for viewing
A person pictured in the portrait series
An image to explore at your own pace