Toshiba SATELLITE PRO S300M - Manual (Page 219)

219 Hot Keys/TOSHIBA Cards
Hot key functions
5.375 x 8.375 ver 2.3
Display brightness
Cycle through the display modes, then select the desired
mode.
Not all functions are supported on all models.
Some systems also support an additional Swap Image Display
mode. This mode is available only if the current setting is an
extended desktop mode (Built-in Display and External Monitor, or
Built-in Display and TV). In extended desktop mode, the image is
split into two sides, one side per display device. To swap sides,
select Swap Image Display.
This TOSHIBA Card decreases or increases the screen
brightness.
Fn + This hot key decreases the screen brightness.
Fn + This hot key increases the screen brightness.
Selecting this Card or pressing either hot key displays the
following options:
(Sample Image) Display brightness
Move the slider or press the appropriate hot key repeatedly
to decrease or increase the display brightness.
NOTE