Add To: Adds the selected item(s) or items contained in album(s) to the category that is selected.
Remove From: Removes the selected item(s) or items contained in album(s) from the category that is selected.
Assign by Genre Info...: Assigns the selected item(s) or items contained in album(s) to a category based on the genre information present in the genre field.
Assign by Release Info...: Assigns the selected item(s) or items contained in album(s) to a category based on the Release information present in the Release field.
Clone From Identically-Named Items...: Assigns the selected item(s) or items contained in album(s) to categories based on the first Artist & Title matching item found in your Media Library (a given item will only be assigned where a match is found and the selected item is currently of "uncat" status).
Remove From All: Removes the selected item(s) or items contained in album(s) from all categories.