First, she cut a three-inch square from the corner of the board (to put over the window frame corner). She had already decided how far out and up she wanted her curtains to hang to make them "high and wide," and she measured seven inches up and nine inches out on the template. She used the curtain rod's bracket to mark the screw holes with a pencil, then drilled through the template, and flipped it over to use it on the other side of the window!
Read More: Hanging a Curtain Rod (Made Simple) at Miss Mustard Seed
Image: Miss Mustard Seed