I tried a lot but didn't find a way to use dropdown list to show the items in
it. I would be appreciated when someone can explain me how I can reach this goal, thanks.
Besides, I also like to know if I can hover my cursor on a nav button to see
the drop down items.
PS: I followed the video tutorials of dropdown list, but after clicking "Block" button, the list items didn't show up as it is in the video...