How to change the orientation in the emulator for Windows Phone 8
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
You can change the orientation in Windows Phone Emulator to one of three orientations: portrait, landscape left, or landscape right. The size of the emulator does not change when you change the orientation.
To change the orientation
On the emulator toolbar, click the rotate left button.
On the emulator toolbar, click the rotate right button.