The Prototype Style for Paragraphs
The Prototype style is the parent to all other styles. When you set a property for the Prototype paragraph style, other paragraph styles inherit the value of that property. You can then override that value for specific styles as needed. The Prototype paragraph style allows you to quickly change a default property and apply that change to all paragraph styles within your Stationery project.
Depending on how you organized your styles in Style Designer, you may not have one style as the parent style on which all others are based. In Microsoft Word, usually all styles are based on Normal, but that may not always be the case. The Prototype style ensures that each of your styles has a parent style within your Stationery project.