Images upload to a standalone form will not be pulled through into the CMS, so you will need to add the image using a simple HTML code to the Form's description.

First, upload the image into the File Library (BB719704), and copy the image URL.

Next, add the custom html to the form:
  1. Navigate to Communities>Forms>Select Form Type
  2. Hover over your form and select Website Info
  3. Select Form Customization
  4. Click Select next to the Form which should display the image
  5. Click Field Order and Label Text
  6. In the Form's description box, enter the following code where you would like the image to appear
<img src="imageURL"/>
  1. Replace imageURL with copied image URL
If needed a </br> code can be added for a line break. This would be useful if there is also text in the Form Description
  1. Click Save
  2. Navigate back to the Webinfo Checklist and click Publish This Event Now