Confused about design copyright?

This website does a fabulous job at explaining this: http://apexcreative.net/owns-design-work/

“Copyright actually refers to a bundle of rights, including the rights to make adaptations (derivative works).

“You, as the client, are paying for the delivery of the final design product [and full usage rights to USE that design]. You are paying for the final work, not the tools to make it [or change it].

“The best analogy I can think of is going out to dinner. Me and the hubby love the Cheesecake Factory. But when we pay $20 for our medium-rare Kobe burger with Cheddar, all we get is that one meal for that one visit. The price doesn’t include the chef coming out, giving us his recipe, utensils, and ingredients to take home, as well as a tutorial.”