Toshiba NB550D - Manual (Page 39)

Brightness Up
Pressing FN + F7 increases the computer's display panel brightness in
individual steps.
Wireless
Pressing FN + F8 switches the active wireless devices.
If no wireless communication device is installed, no dialog box will appear.
Touch Pad
Pressing FN + F9 enables or disables the Touch Pad function.
Zoom
Pressing FN + Space changes the display resolution.
TOSHIBA Zooming Utility (reduce)
Pressing FN + 1 reduces the icon size on the desktop or the font sizes
within one of the supported application windows.
TOSHIBA Zooming Utility (enlarge)
Pressing FN + 2 enlarges the icon size on the desktop or the font
sizes within one of the supported application windows.
Volume Down
Pressing FN + 3 decreases the volume in increment.
Volume Up
Pressing FN + 4 increases the volume in increment.
FN Sticky key
You can use the TOSHIBA Accessibility Utility to make the FN key sticky,
that is, you can press it once, release it, and then press an "F Number"
key. To start the TOSHIBA Accessibility utility, click Start -> All Programs
-> TOSHIBA -> Utilities -> Accessibility.
Windows special keys
The keyboard provides two keys that have special functions in Windows,
the Windows Start Button key activates the Start menu while the
application key has the same function as the secondary (right) mouse
button.
This key activates the Windows Start menu.
This key has the same function as the secondary (right) mouse button.
Keypad overlay
Your computer's keyboard may not have a separate numeric keypad but
includes a numeric keypad overlay which functions like one - this is located
NB500/NB520/NB550D
User's Manual 3-5