How to add Sign in as Different User in SharePoint 2013

Hi, guys, maybe you want to sign as another user to test, in Sharepoint 2007 and Sharepint 2010 we can do this easily, however, Sign as Different User interface is hidden by default in SharePoint ?2013. Next, I will introduce one way to show Sign as Different User interface.
First, enter following path:

C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\CONTROLTEMPLATES

Then, find the file “Welcome.ascx”
At last, add following XML node after the XML node which id=”ID_RequestAccess”

Sequence="100" UseShortId="true" />

Just like following picture display

Show Sign as Different User in SharePoint2013

Now, return you site and refresh the page, click people dropdown control, you will see Sign as Different User interface same as following picture

Show Sign as Different User in SharePoint2013_2