Many apps have all their functions and controls within each program; you get to them by tapping Setup or Options (or something similarly named) while you run the app. Some apps, however, have a separate set of preferences, located in the iPad’s Settings area, under “Apps.”

For example, your nifty little weather program may include the option to display the temperature in either degrees Fahrenheit or Celsius, and wind speeds in either miles per hour or kilometers per hour, depending on the measuring standards of your country. You set these preferences by choosing Home→Settings and flicking all the way down the screen to the collection of individual apps. Tap the name of the app whose settings you want to adjust.