Style declarations – PB Docs 2017

If you right-click an element and select Edit Styles from the
pop-up menu, the Style Declarations dialog box displays the read-only
set of default style declarations for the element on the left:

For clarity, style declarations are omitted from the XHTML export
template. You can add new style declarations or override the existing
ones by declaring them on the right side, or remove them by adding them
with an empty value.