In our Canopy theme, you can create a full-width dropdown menu with headings. We call it a mega menu. You may have seen it in our demo store:
You don't need to touch any code, or even change any theme settings, to get a menu to show like this. It is all down to how your main menu is set up.
The theme switches a dropdown menu into full-width mode when every link inside a dropdown also has a dropdown.
Let's take a look at a demo store's setup:
You can see here (by the little arrows) that "Shop" is a dropdown, and each link inside "Shop" is also a dropdown. "Collections" contains a list of links, as does "Best Sellers" and "Clearance".
It's worth noting that if you don't want the titles (Collections, Best Sellers, Clearance) to link through to anywhere just use a hashtag as the link "#".
Because this is down to how the menus are set up, and not to do with any theme settings, you can set up as many mega menus as you like!