Step 1 : Navigate to the Appearance > Menus section of your admin sidebar.
Step 2 : Click the Create A New Menu link and enter the desired menu name. To save the menu name, click the Create Menu button.
Step 3 : To add a menu item, select one of your created pages on the left hand side and click the Add to Menu button. You can also add all kinds of different posts from the left side.
Step 4 : To add a custom menu item, click the “Custom Links” menu item bar, then enter a custom name and URL into the respective text fields and click “Add to Menu.”
Step 5 : Manage your menus by using the drag and drop functionality. To create a dropdown menu, simply drag a menu item below and slightly to the right of another menu item and it will lock into place. That will set the menu item as child item and automatically appear as a dropdown menu item.
Step 6 : After setting up your menu, scroll down to the bottom of the page to assign the menu to one of the 4 locations in the Theme Locations box.
Step 7 : Once its all done, make sure you click the Save button.