Hi, I'm creating a Salesforce application for a group project in a course I'm currently in and I'm so close to completing it but I can't figure out a few things! The final portion of our project is something we wanted to put the extra effort in: allowing users to upload images and displaying those uploads in a related list on a detail page. So far so good. The problem is that I can't seem to get the IMG() function to work but I think it may be a coding issue.

Firstly, I have a Visualforce page that allows the User to browse for an image and upload it into their hidden Documents Tab. Note: I am developing in Eclipse. The controller class takes the URL of the new Document and stores into a URL field of a custom object:

//all required field entries

myDocument.isPublic = true;

insert myDocument;
        
Gallery__c myGallery = new Gallery__c();
myGallery.Image__c = myDocument.Url;
insert myGallery;

In the custom object, the URL value is plugged into the following formula field:

 HYPERLINK( Image__c , IMAGE(Image__c, "Uploaded Image", 100, 75) )

When I test it all out, instead of getting a resized image that is anchored, I get a text link with the alt "Uploaded Image".

1. What URL does the Document.Url value return? Is it the full document url?

2. I know that 'Externally Available Image' must be activated. Eclipse didn't list any fields similar to isExternallyAvailable so I assumed isPublic is the API equivalent. Are they not the same thing?

3.  Are image displays within another formula function allowed?

Thanks!