How do I combine two existing categories?
Step One: Select the proper tool
Click on the 'Categories' link under the 'Inventory' heading in the Control Panel menu.
Step Two: Edit a Category
From the existing categories list, select the category and click the 'Edit' icon in the Actions column on the right.
Step Three: Make updates
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.
Step Four: Don't forget to save
When you are finished, scroll up/down & click the 'SAVE' button.