Adding a Menu Button
How to add a callout/highlight menu item button to your menu.
Adding a menu button is even easier than adding a search menu icon. Simply add a class of “button” without quotes to the CSS Classes field of any menu item.
When setup correctly, your menu item should look like this:
If you don’t see the CSS Classes field, here is how to make sure it’s enabled in WordPress, via Dashboard > Appearance > Menus: