How to customize BuddyPress Notification triggers?

Trying to figure out where in the BP code to look for hooks or filters so that I can control what triggers notifications.

On the BP site it says “By default, notifications are created as soon as one of the following things happen:”

And then there is a huge list of notification triggers. But I want to turn them on and off as I see fit. Anyone have experience customizing BP? Curious how one goes about this sort of BP customization.

thanks,
Brian