Allows you to use your computer, or a real VT100 terminal if you've got one, to simulate an LCD display.
Since you will be emulating an LCD display then you wont be able to send key presses back from the PC to the micro controller. But if your project wants to simulate an LCD display, and you don't have one, then this is very useful!
If you are using Project Designer and your board already has a UART that you want to re-use as a VT100 display then click the disable check box next to the UART and then add a VT100 Display which uses the same hardware uart instead. This allows you to create a 'heads up display' on the computer along with the graphing facilities described in _display_common.h
The only other thing you will need to do is make sure that your computer terminal software uses VT100 emulation.