You can create a dropdowm menu also with free version.
Go to Appearance->Menus.
Give your menu a name and build it up using little widgets on the right.
You can add pages, categories or custom URL’s.
Now simply select the theme location(Primary Menu in our case) for your newly created menus using a widget on the left. Afterwards, click Save.
So, I go to my dashboard>appearance>menu and edit my current primary menu. I have a menu already and a simply want to modify it by creating dropdown options.is this correct?