Accessibility: how to influence what VoiceOver shows for "Window Spots" (VO-U)

User VoiceOver a user can press VO-U to show the Window Spots menu to quickly navigate to another section of the window.

Whatever the default process of choosing these window spots is using, it's not doing a good job in my app. I'd like to influence what is displayed here, be it which spots appear and their names.

I've found 0 documentation on this. Can anyone shed some light on this?
Accessibility: how to influence what VoiceOver shows for "Window Spots" (VO-U)
 
 
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