I'm trying to create a collection with all my Church Fathers' resources so that I can include it in a custom passage guide template. And here's my difficulty: when I browse my library I see there's already a "category" (I'm not sure what its proper name is) named "Church Fathers" which already includes all my Church Fathers resources (see attached screenshot, it's marked in red as "1"). This is exactly what I'm looking for! So this make me wonder two questions:
1) Is there any way to include this "category" directly in my custom passage guide?
2) If not, when I create a custom collection, how can I include all the resources from this "category"? What search syntax should I use? I've tried several things from the wiki but I haven't managed to find the proper way to do it.
Thank you!