Go to the Content Editor
See the Familiarize Yourself with the Content Editor guide for more information
In the content box, click on where you would like to insert your footnote
The position of the cursor marks where the footnote will appear
Click on the Add a Footnote icon
See Familiarize Yourself with the Content Editor to find the footnote icon
The "Footnotes dialog" window will appear
Fill in your footnote text
Fill in your footnote "Value"
The footnote value is the superscript that will appear next to the text to which the footnote refers
Click on OK
The window will close
Your footnote will insert into the text
Click Save
Save is located at the bottom of the "Edit Book page" window
The window will close
A message will appear confirming the update