Pop-up menu: Setup/Layout configuration (click on icon)
Ribbon menu: Options/Setup/Layout configuration (click on upper textless icon)
With this menu the user may change
•Video format
•Background color (default: None)
•Font
•Number of supporting windows
•Viewport layout
•Gutter size
•Spacing between lines
•Subtitle vertical offset
•Italics spacing
•Context window preferences
•Appearance