The S10-3T has a VGA port which allows you to connect an external display. The external display may be a computer monitor, tv, or projector.
Windows 7 Starter does not have multiple monitor support. You need to upgrade to Home Premium, Pro, or Ultimate. If I recall it may just clone the screen, and not "extend".
There are 4 display modes which can be accessed via 3 different methods:
If you press Win + P you will get these options:
If you don't want wires there's an alternative method via wireless methods.