Toshiba Tecra A4 (PTA40) - Manual (Page 109)

User’s Manual 5-3
The Keyboard
Press Fn + F12 (ScrLock) to lock the cursor on a specific line. The power
on default is off.
Press Fn + Enter to simulate Enter on the enhanced keyboard’s numeric
keypad.
Press Fn + Ctrl to simulate the enhanced keyboard’s right Ctrl key.
Press Fn + Alt to simulate the enhanced keyboard’s right Alt key.
Hotkeys
Hotkeys (Fn + a function or Esc key) let you enable or disable certain
features of the computers.
Sound mute: Pressing Fn + Esc in a Windows environment turns sound
on or off. When you press these hotkeys, the current setting will be
displayed as an icon.
Instant security: Press Fn + F1 to lock the keyboard and blank the screen
to prevent others from accessing your data. To restore the screen and
original settings, press any key. When a dialog box appears, enter the
screensaver password and click OK. If no password is set, the screen will
be restored when you press any key.