If your vehicle has power windows, the switches on the driver's door armrest control each of the windows.
In addition, each passenger's door has a window switch that controls that door's window. Press the front of the switch to open the window. Pull the switch up to close it.
The driver's window switch has an express-down feature which allows the window to be lowered fully without continuously pressing the switch. This switch is labeled AUTO. Press the front of the switch to the first position, and the driver's window will open a small amount. Press the switch down fully and the window will go all the way down.
To stop the window while it is lowering, pull the front of the switch up.