You can change and remove borders that were created with the HTML DIV element.
Make sure that your selection contains all borders that you want to change.
If the borders are nested within each other, their levels will be numbered from the outside in, such as Border level 1 (outermost), Border level 2, Border Level 3 (innermost).
Note You cannot add more border levels by using the Borders and Shading command in Microsoft Word.