master slave items

I just purchased phprunner 5.0, I created a project with tables and entered items while it was still a demo. I now want to establish some Master, Slave relationships between tables that share certain keys. I looked at the Video that shows how it's done and it doesn't seem to difficult...except I can't find the Screen that looks like what is shown in the Video. I select two tables and have tried every link that is available...no such screen. So what's the secret password? <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=9830&image=1&table=forumtopics' class='bbc_emoticon' alt=':blink:' />