What defines what outlines show up in the "Outlines" section of the Passage and Sermon Starter Guides. In my case I have only 4 outline links, but I would expect many more. Three are from dictionaries (none of which are my main ones) and one is from the NAC commentary, but I have others, of course. And I also have the Outline Bible which I think should definitely show up, no? 
Anyway, anyone any ideas?
Thanks.