How do I link an image to text?

I'm building a site using WebsiteBuilder. I want to hyperlink text so that an image pops up when the text is clicked (I could do this on SitebuilderPlus). I know how to create a link, but there isn't an option for an image. The closest thing is linking to a document. I tried that, but when I went into the preview pane to see if that worked, I got an Open Link message and I had to choose to open it in another window, which ended up being a download. Did this happen because I'm in the preview of the editing program and will it function properly later? Or is there a better way to link text to an image? Thank you.