now switch to the intruder tab and click the positions tab screen appears that shows each query parameter highlighted this is burp identifying the spots where we should be fuzzing you can try moving the payload delimiters around or selecting the entire payload to fuzz if you choosebut in our case let' leave burp to decide where we are going to fuzz for claritysee figure - which shows how payload highlighting works now click the payloads tab in this screenclick the payload type drop-down and select extensiongenerated in the payload options sectionclick the select generator button and choose bhp payload generator from the drop-down your payload screen should now look like figure -