To create a Subcategory in your eCommerce shop follow the steps below:
Log into your 123-reg e-commerce package.
Select Preview from the dropdown.
Highlight the category you want to add a subcategory to on the left and side.
Choose Page/category from the list.
Type the Name of the new Subcategory you wish to add.
Select yes to make the new Subcategory Visible.
Click Insert to finish adding the new Subcategory.