Mitsubishi WS-A48 Owner's Manual page 36

CAPTIONS Menu: CC Background
CC Background
(Figure 1)
To make the closed captions easier to read, you
can choose to display the background color as
either black or translucent gray.
Note: Mitsubishi recommends using the
translucent gray background to prevent CRT
aging and/or burn-in.
|MPORTANT
Figure 1. CAPTIONS menu