I had a custom menu (selected now) that I created before changing to Nuntius. I created another one to run a test to see if it would drop-down my sub-menus. No luck. I’m wondering if there is some kind of setting that I’m missing.
You have to manually put the subcategories under the main category and then you have to slide them to the right slightly so they are indented below the main category. Then they will become submenu items off the main parent.