Use Reveal Groups 
to switch between viewing the objects within Groups in the FilmStrip, and seeing only the Group heading rows in the FilmStrip.
Deselect Reveal Groups to aid in moving groups within the design.
Shortcut
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FilmStrip:
Use Reveal Groups to switch between viewing the objects within Groups in the FilmStrip, and seeing only the Group heading rows in the FilmStrip.
Deselect Reveal Groups to aid in moving groups within the design.
Shortcut
FilmStrip: