How to change colors of yarn when knitting?
If you change yarns at the beginning of the row, you literally just start knitting with the new yarn. Leave a bit of a tail, you can knot it to the main color or not, as you choose. If you are doing 2 rows of the contrasting color, then say, 4 rows of the main color, you just bring the contrasting yarn up the side of the work. you wrap the new colored yarn around the working yarn to bring it up the work. If you are just doing one row of the new color, you will have to break the yarn in order to knit back with the main color. not as complicated as you imagine, you can go to knittinghelp.com to see a video on it. also look at stranding, that is how you carry different colors behind your work, across the work.