Values_1.VisualSubtitleFontConfigurationSourceConfigures the display properties of the visual sub-title.
type nonrec t = {fontConfiguration : Values_0.FontConfiguration.t option;textAlignment : Values_0.HorizontalTextAlignment.t option;Determines the alignment of visual sub-title.
*)textTransform : TextTransform.t option;Determines the text transformation of visual sub-title.
*)}