wikiHow to Use Every Nikon Digital SLR -- If you are bewildered by your Nikon digital SLR&#x27;s numerous buttons, modes, and settings, and don&#x27;t feel like reading through hundreds of pages of camera manual, don&#x27;t worry, you&#x27;re not alone. The following steps will guide you through the few settings you should care about and the basics of using every Nikon digital SLR ever made,[1] from 1999 right up to today.