Once the yellow is pulled to the side take the white yarn and twist it over top the yellow and knit as you normally would.
How to change colors in knitting in the round. When the old pattern is complete, and you’re ready to add a different color, start knitting with new yarn. Knit one round in color a. Change colors and knit in color b up until three stitches before the end of that row.
Learn how to add a stripe and do a jogless color change when knitting in the round. Drop yarn b and slip the last three stitches in color a. White the garter stitch is the most basic knitting stitch out.
Cross the old tail over the new. To change colors, start knitting with the new yarn. You'll also learn how to sew in the ends for a perfect join.
Insert your right knitting needle into the next stitch on the left needle purlwise. In the image below you can see how the yarn twists. Cast on your preferred number of stitches in the first color.