Response Headers play a very important role in troubleshooting CDN Integrations. They can show any web behavior from Access-Control to the assets Cache Status, so it is important to know how to view these while troubleshooting a StackPath connection.
There are many ways to view Response Headers, but the two most common methods are browser development tools and bash consoles to pull headers.
Browser Development Tools
The most easily accessible way to view response headers would be using your web browser. In Google Chrome, browse to the page you'd like to research, and right-click(PC) or a command-click(MAC) the page to pull up options and then select Inspect.
The Inspect feature will open the troubleshooting console. This will enable all of the available tools in a panel on the side of the window. 
Select the Network tab
(you may need to refresh in order to view all of the requests made for the page.)
Once all of the requests are visible, you can select any one of them to view the request and response headers for that specific request.
Command Line Tools
There are command line options to view headers, as well. This takes significantly fewer steps than viewing the headers in a browser window. This will only show the headers for one request, and will not be accompanied by the viewable version of the website.
Mac/Linux Terminal
When using a Mac or Linux terminal, the Curl Command using the -I option will output only the Response Headers, for example:
Windows Powershell
The same request can be met by the Invoke-WebRequest command and the -Uri option. Additionally, it is recommended to select then expand the header field to make troubleshooting the headers easier.
