display an image that I uploaded

I have been trying to create a display for an image that was uploaded. I have found this workaround (its 7 years old) but I can't get it to work. Im not sure if it is my inexperience or what but I could use some help!

https://help.zoho.com/portal/en/community/forumHome.do?forumGroupId=2266000000002001&forumTopicId=2266000000011648&highlight=file+upload+url&sid=d3a4f81d9f4c1cba5f4b410f7ba70bff

I would appreciate any help - thank you!!!