I know Access is old news, but I have recently been asked to take a look at an old Access app.

This application replaces the existing menu at the top with a custom one, which really limits what you can do.

The solution to getting the menu back is to right click in the menu area, select customize, highlight “Menu Bar” and select properties, and change “Allow hide/show…” checkbox.  After you do this, you can then add it back into your form.