I'd like to add a custom image to the Submission Confirmation page, but have a few questions:
Is this your Maestro submission confirmation page or a portal confirmation page?
If its a Maestro Submission Page you can add the image via the template using the image component, alternatively if its a Portal page you could add the image as a Portal property and use the relative reference to that property in the mark up on the portal page.
this is a Portal confirmation page.
I added the image as a Portal resource, and was having trouble getting the correct path to the image.
I found that I was missing a part of the path; now its working as expected.