Where to change the level of notification

I get daily emails the backup grooming is successful, but I would like to change the setting so that it only sends an email upon error. I'm on the new PBS (v2.0-9) and as with the VE has the latest stable build (PVE 5.11.22-8 as of this post). I would like some help finding where to change a setting...

The documentation clearly states this in the "maintenance.html" page:

You can also change the level of notification received per task type, the following options are available:

• ...

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