Can you share a sample screenshot of what you mean?

I think this is what he is looking for a drop down menu when you click on a topic sub selection expand under it.  click on another topic and the fist selection will close and the new selection will expand.

Alex, I don't have a sample, but what Juan displayed is what I was thinking about.  Thank you Ron for providing an example.

It's called accordion menu.  I often call it collapsible menu, the same way an accordion can "collapse" together.  Accordion menus are more common in HTML and CSS content, and not so common in traditional Windows forms.  If your form mimics the look of a webpage (see picture below), then maybe accordion menus will be helpful.  It all depends on how helpful it is to the users.

Would a Treeview work instead?
Access Developer 20

Not familiar with Tree View in Access. I will look at Access Developer 20.

I am currently on Developer 13, but I did look at Developer 20...it might be what I am looking for.
Thank you for your help to both Alex, Juan and Kevin.

One alternative would be to use one of the Navigation Forms built into
Access.  I personally don't like those and find them hard to use.

The better way in my opinion, would be to make your own menu system.
Richard demonstrated a way to make kind of a "flyout menu" first in the
ABCD (Microsoft Access Business & Contact Database)

Later in the free Vehicle Maintenance video. He demonstrated the same concept of using a label to change the subform control.

Thanks for the info. I too do not use Navigation Forms, they do not offer much flexibility.  I'm looks like the aforementioned videos from Richard.