Creating subcategories
To create a new subcategory, click on the gray (+) button, located at the bottom of the page:
When creating a second subcategory, you can choose to create new subcategories from among the ones you created earlier. To do this, simply click the (+) button that is positioned between them:
Dragging subcategories
By holding down the left mouse button and dragging the subcategories to the desired position, you can move and change the order of the subcategories:
Excluding subcategories
To delete a subcategory, simply select it by clicking on its name, and then click on the trash: