1. Click on "Settings" icon.
2. Select "Asset" bar.
3. Choose from selection to be filled up.
4. Select "Categories".
5. Click "+Add" to add a new categories.
6. For asset, select "Asset Category",
7. Name the category.
8. Choose the parent category (if any).
To choose a parent category, first you have to create the parent category. Only existing category will appear inside the list of Parent Category.
9. Click "Save" to upload.