Top Box: At the top of each page, helps users by immediately identifying purpose of the guide or the page. Simply state the purpose or provide clarity and any important information in the "top box" (use Header settings for these)
Boxes
Adding a Standard Box to a page:
Select "Add Box"
Fill in Box Name
Select box type (see examples below)
If you check the "Floating" box, it will appear that way in the front facing page but not in the creation of the guide.
For more details, follow these directions from Springshare.