Many apps give you a different view when you rotate iPhone.
![iPhone in vertical (portrait) orientation showing Calendar in day view. To the right iPhone is turned lengthwise, showing Calendar in week view](http://help.apple.com/iphone/9/en.lproj/Art/BSC_rotate_P1.png)
To lock the screen in portrait orientation, swipe up from the bottom edge of the screen to open Control Center, then tap .
The Portrait orientation lock icon appears in the status bar when the screen orientation is locked.
When you use iPhone 6 Plus or iPhone 6s Plus in landscape orientation, some apps have special layouts. These apps include:
Mail
Calendar
Settings
Note: These special layouts are not available when Display Zoom is enabled.