To navigate to the style properties, go to ACP → Appearance → Style Properties → Choose [TH] Featured Threads and Content.
Message display style - Choose the style for the icon.
Display first post as an article - Displays the first post as an article.
Enable first post author meta - Displays the first post author meta information but is only applicable when “Display first post as an article” is enabled.
Icon size - Choose the size you would like for the icon for each featured content to be.
Icon style - Choose the style you would like for the icon for each featured content.