Each Theme subsection includes several properties whose values are referenced by one or more Style properties. The property values in Theme subsections are set when you choose a Theme. You may modify the properties if desired.
The Theme.Slideshows section includes style properties that affect slideshows. Slideshows are not yet implemented in GedSite, but the style properties have been included here in anticipation of their addition.
See the Styles Section help page for more details.