When in an account and you scroll down to contacts it shows the following fields on this screen,

 

Contact Name, Email, Phone, Mobile and Fax

 

Is it possible to change this?

 

I'd like to remove Fax from this view and put the Contact's Title so when I scroll down at the account level and see all my contacts I see the title of the person on screen and don't have to click on a name to see it.