Board Thread:Support Requests - Getting Technical/@comment-8403504-20140703033000/@comment-5558012-20140703033616

Old Visual Editor: Click Edit on article page -> Visual -> To the right, find the Categories section and click the "x" next to the category.

New Visual Editor: Click Edit on article page -> Click the three bars next to "Cancel" -> Categories -> Click arrow next to category -> Click trash can -> Click Apply Changes.