Users have the option of adjusting the scan’s length.
To do that, when Starting a New Scan, turn to the “Advanced” tab :

Mark down “Duration Timeout”, then, fill in the desired time and click on “Start a New Scan” :

In the example above, the initiated scan will be Stopped after 3 hours.
You can view the time being set in a Target’s ‘Settings’ tab:

Note: If Kayran has finished Scanning the Target before the Duration Time being set, the scan will be Completed and will not continue.