➤ Here you can find the instructions on how to set the category thumbnail image.
1. Go to Products > Categories.
2. Select the subcategory or category you want to add thumbnail image to.
3. Expand the Catalog Images Grid tab.
4. Upload the Thumbnail Image (click on the Upload button).
5. Activate Image Grid for the category.
6. Specify the font icon class in the Css class for Font Icon option field.
You can find the font icon css class here.
7. Save the settings.