How do I combine two existing categories?

How do I combine two existing categories?

1) Click 'Categories' under the 'Inventory' heading of the 'Control Panel'. 


2) From the categories list, select the category and click the 'Edit' icon in the Actions column on the right.


3) On the 'DETAILS' tab, scroll down to 'Advanced' section and click on the 'Additional Category' dropdown menu and select the category you would like to combine with your original selection.



4) When you are finished, scroll up/down & click the 'SAVE' button.