Apple - How to show all annotations at once in Preview?

This is a workaround, as I couldn't find a hotkey or menu option to do this. Still, clicking

View > Hide Notes

and then

View > Show Notes

Will show all anotations. I can now see all the annotations without manually clicking them. This worked on Preview 5.5.1.

For Preview 8.1, I was also concerned that all my Notes were minimized (their term, not "hidden"). Solution is to change the default (new since 10.7 I think):

View > Highlights and Notes

Once this is toggled, the Notes again show in margins.