The white on a puppies face will "shrink" as they grow to adulthood. Here are some examples of baby markings verus adult markings
Markings on the puppies faces can alter the "look" of the puppy's head shape. Here is the same puppy with markings changed
ALL berner puppies are born with pink noses. Their pigment comes as they get older. Here is a pup from birth through 6 weeks.
When we talk about "in" coat and "out" of coat, here is an example.
This is the SAME girl in and out of coat.