It’s very simple to set up. It’s now one of the options when adding a Question (prompt).
Note: The image is encoded and stored in base64 format. It is not automatically viewable in Excel, Sheets, etc. but it is on the codeREADr.com Scans page and in your shared CSV Download Link’s web portal. Developers will generate the image from the base64 string in their programs. If you want to view an image downloaded to Excel, copy and paste the string into an online decoder like the one offered by Code Beautify.