Step 1 : Open the Configuration Manager dialog.
Step 2 : Select “<New..”> option from the Active solution configuration dropdown.
Step 3: Give some name to your configuration, and if you dont require an empty config file I would suggest you to copy the settings from the existing “Release” transform.
Step 4: Right click on the web.config file and select the “Add Config Transform” option.
Step 5: And you should see your Staging config created. You can similarly create a qa and production/live configs too.