In Windows Phone 8.1, there are two ways to project your screen.

Wireless

Projecting your screen wirelessly uses Miracast technology. This requires a compatible receiver (e.g. a Smart TV, Netgear PTV3000) and will support only on newer WP 8.1.

Wired

Here I am going to show the steps to project your windows phone 8.1 screen to an external display by using USB cable.

Steps: