If you mean that the Gallery itself is displaying when you launch Word you
can go to Word>Preferences>Gallery & remove the check which is in place by
default: Open Elements Gallery when application opens.
OTOH, if you've discovered that and are referring to the 5 buttons
themselves, John is quite correct - they can't be turned off.
Should you ever come to find the tools somewhat useful, once you expand the
Gallery by clicking a button you can then double-click a button to collapse
it again when you're done.
HTH |:>)
Bob Jones
[MVP] Office:Mac