I did not see "Church History Themes" as a feature for Verbum 10. I did see it available as part of the Logos 10 Features.
Is that really the case?
It was not included in Verbum 10. See this thread for more: https://community.logos.com/forums/t/210671.aspx
It was not included in Verbum 10. See this thread for more: https://community.logos.com/forums/t/210671.aspx