In case, you want to re-order the categories, follow these steps:
Go to the Menu on the extreme left
Click on the 4th icon in the Menu list “Inventory”
Click on “Categories” section
You will be landed on the Category Manager Page
Click on “reorder option” (next to ‘Action’),
Drag the category in the order you want it to be placed, and then
Click on “Save Order” to make the changes.
Note- Mandatory fields are required to be filled! Whereas, optional fields are not compulsory.