One of the first customizations folks make to their Emacs is to hide the menu bar. This makes some sense if you’re using a completion UI like Ivy: it’s usually faster and more convenient to find an option using fuzzy completion in the minibuffer than it is to mouse over a series of menus. Also, the menu covers only options that are relevant to the end-user. If you want fine-grained customization or access to Emacs’ API, you’ll need to use a different interface (like customize).
