When you are using more than one scanner with a workstation, you should give them names to easily identify them..
Turn on the Symbol
Press Start>Settings
Change to the 'System' Tab
And select the 'About' Icon
Select the Device ID tab
And by clicking on the keyboard icon, enter a name for the scanner.
to bring up the on screen keyboard press the keyboard icon at the bottom of the screen
This launches the keyboard
to close the keyboard press the icon again
