Adding a dropdown menu to the main menu

Is there a simple way to add a dropdown menu to the main menu and have it point to different parts of the same page (or even different pages)?
For example, if I hover over this:
I would ideally like to see:
Publications
- Journal Papers
- Conference Papers

Which would take you directly to that section of the markdown file instead of making you scroll down the file.

I have attempted this via html but my skills are very basic. Any help is appreciated!

The main menu is likely defined in a layout file like _layouts/default.html or includes/navigation.html. Look for the navigation structure and see how links are generated. You'll need to add HTML/CSS for a dropdown that links to page sections via anchor tags (#journal-papers). Test by modifying the SCSS in _sass/ for styling and check the Jekyll build locally.

Written by the indexing model from the issue text.