Ask most people how their website's navigation works and they'll say "the menu at the top." Fair enough, that's the one you notice. But if you're building on Cantrip, you're actually managing three separate menus, and they don't behave quite the same way.
There's the primary menu, the one across the top of every page. There's the footer menu, the smaller list of links down at the bottom. And there's a social menu, just for your Instagram, Facebook, or Twitter links. Three fixed slots. You can't invent a fourth one, and you can't merge them into one big list either. Each has its own job.
Here's the part worth knowing: a menu item doesn't have to point at one of your own pages. You can link to a specific blog post, to a whole collection (say, your portfolio or your list of services), or just paste in any URL you want. That last one is the bit people miss. Booking software on a different domain, a Yelp page, a PDF you host somewhere else: all fair game, and you can set it to open in a new tab so people don't lose your site along the way.
The social menu does one small trick on its own. Paste in a link to your Instagram or Facebook page and the right icon shows up automatically. It's just reading the domain, nothing smarter than that, so it only recognizes the big three: Twitter, Facebook, and Instagram. Link to your Yelp page in the social menu and you'll get a plain link, not a Yelp icon. Not a big deal, just don't expect magic.
The one real limit: menus only nest one level deep, a top item with a dropdown underneath it. That mostly matters for the primary menu up top. Footer and social links stay a flat list, which is honestly all they need to be. No mega menu with six columns, no three-tier flyout nav that unfolds like a filing cabinet. If your site needs more than that, you've probably built more site than a small business actually needs. Same thing we say a lot around here: most sites don't need to be complicated.
Most businesses land on something simple anyway: Home, Services, About, Contact up top, a copyright line and a privacy link in the footer, icons for wherever you actually post. Two levels is plenty of room for that.