To control how you buy things from the iTunes Store, you need to change a setting.
On a Mac, do this by going to the iTunes menu at the top right of the screen and choosing Preferences.
On a PC, go to the Edit menu and choose Preferences.
After you’ve done this, choose the Store tab. In that tab, the first options you have are to buy from the iTunes store using One-Click or a shopping cart.
One-Click shopping means that you’ll just click a “buy” button in the store and automatically be charged and download the song.
Shopping cart means that when you click the “buy” button, your purchase will be added to a shopping cart that you can review and edit before you check out and pay.
One-Click is more convenient, but it also charges you right away, so if you like to think about purchases or have an itchy trigger finger, you may want to choose the shopping cart.
Once you’ve made your selection click “OK” and you’re ready to shop!
