Customizing the body and sidebar of your Facebook shop is easy! From your MiiDuu Dashboard go to Facebook Shop -> Customization and scroll down to where it says Layout. From there just check what you want displayed in your Sidebar and Body, and then assign each one a number 1-3 to determine which order they are displayed in. That's it! Don't forget to click "Save" before leaving the page!
You can also add more options to your Facebook navigation bar. From your MiiDuu dashboard navigate to Facebook Shop -> Customization. When you scroll to the bottom of the page you will see a section labeled "Top Navigation Bar". Simply type in the text you would like to display in the space provided, select the page you would like it to direct your customers to, and click add! You can add as many as you want (space allowing). Don't forget to click "Save" before leaving the page!