I don't see a slider for font size in navigation or the header or in edit menu.

I figured it out. The products were set to draft. When I had active products it works.

Thanks. I figured it out. I needed to have active products for each collection.

I want to make the menu text larger. How do I do that?

How do I get products to show up in the featured collection on the main page? 

The popular collection list on the main page does nothing when I click on them. When I click on "View All" button it loads the full list and again clicking on them does nothing. What am I missing?