Lenovo ThinkPad X220 4298 User Manual page 60

3. Close the computer display slowly, holding the upper left and right sides with both hands.
Note: Make sure that the display is rotated at 180 degrees, so that the back of the display faces the
keyboard.
4. Your computer is now in the tablet mode.
To return your computer to the notebook mode, do as follows:
1. Open the display by at least 45 degrees, preferably by 90 degrees.
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User Guide