Marshall electronic V-R171X-DLW - Manual (Page 14)

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■ Marker Background
Use this setting to choose how selected markers are displayed on the screen:
• Off The marker is superimposed on the complete image.
• 50% Gray Screen area beyond the marker is shown at 50% intensity.
• Black Screen area beyond the marker is shown as black.
Example (80% Marker in 4:3 Mode):
■ Center Marker
Use this setting to display a center marker on the screen.
Video Config Submenu
Use the Video Configuration submenu to select various video settings such as monochrome mode or blue-only mode.
Video Configuration Submenu
Center Marker
Background OFF 50% Gray Background Black Background