This is a very useful feature. All you have to do is to change the URL in the address bar to get this working. Now, if you are running ColdFusion on a live site, this feature should be shut off in the ColdFusion Administrator. Here is the URL with and without debugging. The only difference is we have added an extra variable to the URL. Just add it to the last variable after the question mark in the URL.
Here is the screenshot of the debugging window.
We can see that there are a number of features to this debugging window. ...