3M MP220 Operator's Manual page 40

Accented and Alternate Letters
Accented and alternate letters display when you move the mouse point over the
letter and then press and hold the Touch Sensor.
Shortcut for Entering Commonly Used Punctuation and Symbols
Press and hold the "." period key and a context menu displays with other
punctuation marks and symbols. Select one and it will be entered into the text field.
Changing the Keyboard Language
You can change the keyboard language using the spacebar. You select the language
you want to use in the Input Languages selection in the Language & keyboard
Settings.
1 Position the mouse pointer over the spacebar.
2 Press down and slide your finger across the Touch Sensor. You will see the
new language coming from the left or the right. Make sure the new language
is centered on the space bar before releasing the button.
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3M Pocket Projector MP220