To get the right length, measure from the floor to where your curtain rod will be mounted, keeping in mind standard curtain lengths: 63, 84, 96, 108, and 120 inches. A general rule of thumb is to hang rods 4 to 6 inches above the window frame to create the illusion of taller ceilings. Curtains should extend 3-6 inches beyond each side of the window for full coverage. For a luxurious, full look, use curtains that are twice the width of the window.
With your curtain style in mind, measure the height where you want your curtain panels to hang. Use a level to ensure straight alignment.
Position the bracket at the desired height, then mark the screw holes with a pencil.
Install wall anchors, drill pilot holes with a 1/8" bit, insert screws leaving 1/4" out, slide bracket on and tighten.
Slide curtains onto the rod and place the rod into the brackets. Adjust as needed.