When your window treatment of choice is new curtains, then you will have to install a curtain rod. This is a relatively easy task. You will have to determine the style of your window treatment, the height and width of the curtains.
The first step is to decide if you are going to mount the curtain rod on the window casing or the wall. In either case, hold the rod up to the casing or the wall and, based on all of your measurements, mark off the proper height. Place the brackets out three to six inches beyond the window edges, depending on the look you desire with the curtains. Check with a level to make sure the rod is level and make marks where the tops of the brackets and where the bracket holes are on the wall. Drill small starter holes into the marks for the screws. Insert the screws through the brackets and tighten them into place. If you have a wide window, it is advisable to add a center bracket as well to make sure the weight of the curtains is properly supported.
If you have a bay window, this will be a bit more complicated. You will be installing three separate rods to provide curtain coverage of the three windows. The outer brackets will be the same as for the regular window. But the inner brackets will have two arms each so that they can support both ends of the center curtain rod and one end each of the outer curtain rods.
Now position the curtain rod into the brackets and you are ready to put up your curtains.