First evaluate the window and the window covering that you’re planning to use. Will the design be installed inside or outside of the window frame? Each design is different for each window application. An inside mount requires a pole or rod which fits within the widow frame. Ideas include a basic traverse rod, ceiling mount rod, a swivel rod, and a tension rod. The outside mount design has no restrictions. Is your window treatment moveable or is it stationary? With the stationary treatment you could try the continental rod or pole with finals. With the moveable treatment the traverse rods work the best. What also influences your decision is whether you will see the hardware or not. If you would like to show off your hardware, a poll with finals will be your most decorative option. If your hardware is to remain unseen, the traverse rod will do the trick – it will allow easy movement of the curtain and tuck below a cornice or valence.
Make sure you plan ahead where the operating controls will be located. Usually you place the control on the side with the best access and least visibility. If you’re operating a cord and wand system, have both on the same side of your treatment. For corner windows, so they don’t look cluttered, have the cord system on the right for the right window, and the other on the left side for the left window.