Trigger by Appending Parameters to URL
The simplest way to trigger a trace including callgraph is by appending parameters to the URL of the application in your browser and reloading the page.
Go to the Trigger Trace dialog
Click "Generate Token" and then "copy" the query string.
Append this string (by pasting it) to an URL of your site and open that page.
The "My Callgraph Traces" view will refresh with traces that have been triggered by appending parameters to the URL.