I have answered my own question, thanks.
I looked at it more carefully. If you look at the properties of the Default task, "Scan: interactive selection", and enable the advanced configuration there is a scheduling property. Open that and it tells you which scheduled event it is associated with: "This task is scheduled by the following scheduler event...". You can even modify that scheduled event from this window
.
However this does not accomplish what I was originally trying to do. That is, schedule a daily task to scan my Documents folder only. The "Scan: interactive selection" as the name implies is an interactive scan, prompting you to select which folder or drives you want to scan. I want it automated.
So you have to make a copy of the "Scan local disks" task, modify it to suit by adding exclusions and associating it with a scheduled task named "scan Documents" or something like that.
Now I got it.
I feel like I am talking to myself here so I better sign off