Dell Latitude XT PP12S User Manual page 57

When you convert your Tablet-PC between notebook and tablet modes, the
screen orientation of your Tablet-PC will automatically change according to
the settings you have established in the Dell QuickSet application or the Pen
and Tablet settings application, most commonly from landscape (notebook
mode) to portrait (tablet mode). See "QuickSet" on page 71 for more
information on customizing your Tablet-PC settings.
To convert your Tablet-PC from tablet mode to notebook mode:
NOTICE:
Forcing the hinge beyond the 180-degree point will damage your
Tablet-PC.
NOTICE:
Ensure that the display assembly does not scrape the keycaps as you
rotate the display, or you may cause damage to your keyboard.
1 Lift the display until it reaches a 90-degree angle, perpendicular to the
base.
Setting Up and Using Your Tablet-PC
57