Thanks for your response Justin.
By “Gallery Types” I mean those options that you can access via Edit Gallery -> Gallery Settings -> Type. This is usually not done through a plugin and is a basic feature of other themes on wordpress (Expound, Hemingway and McKinley for example. However on Stargazer I can only access this option through the the ‘Tiled Galleries Carousel Without Jetpack’ Plugin and even then the gallery layout does not change.
Don’t get me wrong, I really like Stargazer, I am just confused by the fact that I cannot change the display settings of images in a gallery.