I've seen a ton of posts on how to link from a help topic to an external PDF but not the opposite. I have a help topic that links to a PDF on the same server. The PDF displays in the same Help window. I want to place a link in the PDF that would then open a specific Help topic, but I'm not sure what the URL would be? The Help topic is already open when the user clicks the link in the PDF.
I'm using RoboHelp 5.