* Power Windows: There's usually a switch on the driver's side door panel. This switch will have a button (or sometimes a rocker switch) clearly marked with an up arrow and a down arrow. Press the down arrow to lower the window.
* Manual Windows: There's a crank handle usually located on the driver's side door panel. Rotate the crank handle clockwise to lower the window.
If neither of these methods work, there could be a problem with the window mechanism, the switch, or the wiring.