New to OSX. Need a little help.

my ocd kicking , can't figure out how change network name mba.

windows network , other devices in house showing mba "mackbookair-7574" on network , can't figure out change it. can't find other reference name on machine.

had thought changed name in sharing section, have changed "mba" , still shows 7574 name. missing here?

settings

 

try clicking "edit" next computer name. see says there.

 

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