Acrobat DC Mac: key command for Page Labels?

Does anyone know a way to set a keyboard shortcut for assigning Page Labels in Acr. DC?

I'd be happy to work through menu options using Keyboard Maestro, but Acrobat won't let me drill down to the right level: there's no direct way to get to that 'button' directly from View/Navigation Pane/Page Thumbnails and then to the submenu Page Labels; that submenu can't be accessed from the main menu, only on its own.

I use page labels a lot, and would like to devise a shortcut for it.

Thanks.