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"Upload Controlled Vocabularies" is for uploading new or changed vocabularies. It is also for downloading existing vocabularies
Tip: Instead of making a new csv or txt file for upload, download an existing vocabulary and use it for template of new ones.
Use of columns in vocabularies : Name | Definition | Contacts | Identifier . You cannot take action on contacts in any controlled vocabulary unless it is paired with an Input Type for "people" . Identifiers are for advanced features. The Identifier values in the Subjects CV correspond to code used by ProQuest. — this needs to be confirmed.
Last area is live/ on screen editing for of vocabularies.