The Category Selector allows the category selection for the files in the Buffer Zone that will be edited.

Example:
If the interface selection is SONG then the work interface will be the SONG Editor and all that is edited from the buffer zone will be moved in the SONG category (table).

If your interface selection is Commercial (identical with Jingle, Promo, Effect, Base, Acapella, Generic, News), the data will be saved in the AllOthers category (table) with different identifiers for each different recording (Jingle, Promo, Effect, Base, Acapella, Generic, News).