If you have an iPhone and have already bought iPhone apps, you can install them on your iPad too. Although you can run iPhone apps on the iPad, most iPhone apps won’t use up the full screen of the iPad, as shown in Figure 10-7.

Figure 10-7. Most iPhone apps won’t use the entire iPad screen.

However, you can expand an iPhone app so it fills up the entire iPad screen. Just tap the 2x button in the bottom-right corner of the iPad screen to blow up an iPhone app, as shown in Figure 10-8.

Figure 10-8. You can expand an iPhone app to fill up the iPad screen.

To shrink an expanded iPhone app screen back to its normal size, tap the 1x button in the bottom-right corner of the screen.