The iPhone’s display automatically adjusts depending on how you are holding the device. So if you have the iPhone positioned vertically, the screen orients into portrait mode and if you are holding it horizontally, the screen changes to landscape mode. If you want to prevent the screen from changing to portrait mode, you can lock the display’s orientation. Likewise if you’ve accidentally locked the display in portrait mode, you can unlock the screen orientation and change it to landscape. Tips Writer Bio
