Sony VAIO Duo 13 User Manual page 13

Touch panel
Notes on Using the Touch Screen (Touch screen equipped models)
Enlarging the Text Size (DPI) (Touch screen equipped models)
How to Use the Touch Screen (Touch screen equipped models)
Location information
Disabling the Download of the Location Information (GNSS equipped models)
Downloading the Location Information (GNSS equipped models)
Sensor
About Built-In Sensors
Notes on Built-In Sensors
Security
Updating Your VAIO Computer
Menu
Opening Control Panel
Windows 8
Using Sleep Mode
Pen
Starting Your Preferred App when You Detach the Pen (Digitizer Stylus supplied models)
Face Recognition
Using Face Recognition
Notes on Face Recognition
Signing In to Windows Using Face Recognition