Work with Sub Menu Section
http://demo-flatnews.blogspot.com/2015/01/work-with-sub-menu-section.html
Access your blog Layout, you will see a section has light yellow background, that was labeled with big text "Sub menu section". Under the label is the link "Add a Gadget", you will use this link to add Link List widgets (or Label widgets) into Sub menu, no limit number of widgets.
As default, I had already added 2 widgets into sub menu for you: 1 Label widget (with title: Life Style) and 1 Link List widget (with title: Health). So in this guide, we will modify these widgets first.
The related rule between main menu and sub menu is:
The title of widget in sub menu must be similar with the name of a link (or label) in main menu.
Example: I created a link with name "Home" in Main menu section. If I want it has a sub menu, I must add (or modify) a widget with title "Home" in Sub menu section.Now, we had 2 widgets in Sub menu section. Just click edit link on them, input data and modify their titles.