How To Catch Strands
Before you begin the Catch Strands technique your work should look like the image below, with long strands of the yellow and black in the body of the fabric:
Step 1: Pass the right needle under the two strands of yarn in front.
Step 2: Knit into the next stitch on the left needle, leaving it on the needle.
Step 3: Bring the new stitch under the two long strands of yarn you picked up.
Step 4: Slide the stitch off the left needle.