Pre processor is a process to be performed before sending a request to the scanning target.
Pre processor includes features such as "Hand over of variable parameters" and "Replacement of sent parameter values". Using these features to specify Hand over parameters between pages, you will be able to access the scanning target pages properly.
In actual behavior, what you set in Pre processor is executed before sending a request to the scanning target during a scan. In this process, you can reproduce the page transition by specifying the Message ID of the transition source and handover the variable parameter by entering Hand over settings.
The above diagram describes a transition flow from the "TOP" to the "Completion page" of a target system.
To reproduce a page transition, set the Pre processor Handler to all four positions(No.1-4 in the above diagram) located between pages from the "TOP" page to the scanning target page.