How to Join in the Round Invisibly To join in the round invisibly, cast on one more stitch than your pattern calls for. Then, when you’re ready to join in the round, slip this extra stitch to the left needle. Using the working yarn and the yarn tail held Cast On Knitting, Knitting Help, Knitting For Beginners, Knitting Socks, Loom Knitting, Knitting Stitches, Knitting Needles, Knitting Patterns, Joining Yarn