How to Enable Sign in as Different User Option in SharePoint 2013

Problem

By default in SharePoint 2013 there is no option for "Sign in as different user".

Use the following procedure to enable this in SharePoint 2013.

Solutions

Step 1

Go to the location:
C:\Program Files\Common Files\microsoft shared\Web ServerExtensions\15\TEMPLATE\CONTROLTEMPLATES
Here we have a file named "welcome.ascx".
We need to edit this file to enable the option.

Step 2

Open the welcome.ascx file in Visual Studio or in Notepad and add the following code

<SharePoint:MenuItemTemplate runat="server" ID="ID_LoginAsDifferentUser"  Text="<%$Resources:wss,personalactions_loginasdifferentuser%>"  Description="<%$Resources:wss,personalactions_loginasdifferentuserdescription%>"  MenuGroupId="100"  Sequence="100"  UseShortId="true"  />

before the content SharePoint:MenuItemTemplate runat="server" ID="ID_RequestAccess"

and save it:

 
Step 3

Refresh the site and then "Sign in as different user" will be enabled.