How do I add a header image to a category page?
To assign a category header image, visit
Admin > Catalog > Categories.
Select an existing category or sub-category that you wish to edit, or click Add Category
On the Category page, click on the tab Category Link / Image:
Click Choose File for the Detail View Image. Select the image from your computer.
Note!
The image must be .JPG format to be visible. .PNG will not work. . Once you are finished, click Add Category or Update
Direct link to this Question: