# xterm > A terminal emulator for the X Window System. > More information: . - Open the terminal with a title of `Example`: `xterm -T {{Example}}` - Open the terminal in fullscreen mode: `xterm -fullscreen` - Open the terminal with a dark blue background and yellow foreground (font color): `xterm -bg {{darkblue}} -fg {{yellow}}` - Open the terminal with 100 characters per line and 35 lines, in screen position x=200px, y=20px: `xterm -geometry {{100}}x{{35}}+{{200}}+{{20}}` - Open the terminal using a Serif font and a font size equal to 20: `xterm -fa {{'Serif'}} -fs {{20}}`