Follow the teepee sewing instructions provided with the pattern. To make channels for the teepee poles, you will need to make a French seam. With the lining already stitched to the outside fabric layer at the top and bottom of each panel, lay two panels together, lining sides facing (Image 1). Mark and cut the corner, at the bottom of the channel, on a diagonal 2" from the side and 2" from the bottom (Image 2). Pin the two panels together (Image 3). Sew together with a heavy-duty needle, leaving a 1/2" seam allowance. Remove the pins and flip the panels so the exterior canvas fabric layers are facing together. Re-pin the panels together; the first seam will now be enclosed. Use a piece of masking tape to mark a 2" guide on a sewing machine; measure 2" to the right of the needle (Image 4). Use this guide to stitch the panels together with a 2" seam allowance (Image 5). After sewing, remove the pins.