At the bottom of the page, there is probably a box listing diagnostic information from the latest request. There are several ways to control whether and when this information is displayed. This information is exclusively meant for development time use and is easily removed completely from the application before testing or deployment.
The display of this information can be passing a "wtfFilter" querystring parameters along with any request to the web app. Depending on the value of wtfFilter, the control is for a single request or a new default is set and stored in a session cookie.
The following links show how to send information to this page (or any page) in order to turn on/off the diagnostics. Look at the URL location to see the querystring parameters.