From the frontal view, you can tell that this nose was shortened by looking for the nostrils.  We want to see just a small glimpse of the nostrils from this view.  That glimpse tells us that the nose is attractively short.  In the before picture above left, you can't see her nostrils at all, whereas in the after view, you do get just a small peek at the nostrils.

The rhinoplasty surgery tutorial contains an illustrated explanation of the relationship between the length of the nose and the view of the nostrils from the front (the surgery tutorials contain explicit photographs taken during surgery).