After the Image is uploaded be sure to copy the URL of the Image.
Then navigate to:
- Find the Page your looking to edit the category to add the Image to (or navigate to Content > Category (Text, News etc) and find the category listed there
- Click the Editing Pencil
- Click on the HTML option
- Within the HTML you will enter the Following where you would like the Image to display.
<img src="https://URL GOES HERE">