Then maneuvering the roll back to the cutting table and straight enough to cut. I ended up clipping the edges to the cutting board so that it would not slip and slide while I cut.
I did that much last night, managing to get three lengths cut successfully. I hope to get more cut tonight and begin to sew the lengths together. The window width is 96 inches so I need to make the valance double that, or 192 inches. Oh my. That's a lot of fabric to handle - AND, it has to be lined.