Toshiba T2000 Maintenance Manual page 108

The options are:
Normal:Semi-Bright,Intense:Bright (default)
Normal:Bright,Intense:Semi-Bright
If you're primarily using text-based programs as opposed to graphics software, you
may find that choosing Normal:Bright,Intense:Semi-Bright makes the
text easier to read.
(3) LCD Gray Scale Level
This specifies the levels of gray and reverses how characters are displayed on the
LCD screen.
Normal 16 Levels
Reverse 16 Levels
Normal 8 Levels
3-56
Displays black characters and graphics on a white
background with 16 levels of gray.
This is the default setting.
Displays white characters and graphics on a black
background with 16 levels of gray.
Displays black characters and graphics on a white