- Go to the Design page at the top menu of your admin section.
- Choose Assets at the left menu.
- Upload a Custom Style Attachment by clicking add.
- Proceed to customizing your CSS in Stylesheet.
- On the top-left corner of the style sheet window, you will see an Image icon. Once you click on it, a selection of your saved assets will be displayed, and once you select specific item, it will be automatically added to your stylesheet.