In recent years, some applications with a large number of menu commands and dialog-accessible functionality have introduced a "Find action" dialog, where a user can search the menus (and toolbars, and dialogs) for functionality using its name, or its UI label name.

A specific example is CLion, where one can access it using "Help" on the menu. The search dialog is actually one tab in a dialog for searching for other entities which aren't merely text (files, classes, actions, etc.)

This will be particularly helpful for newbie users which do not have a good command of the UI, and could be pointed out for them, somehow, early in any instructional video, introductory help page etc as the place to go when they don't know where anything else is.