I’d like to share a video I recently found which explains how to catch floats when you are doing fair isle or as it’s sometimes called, stranded knitting. As you knit, you basically are catching the yarn on the back of the work. Some fair isle tutorials have you pulling the second color up and around the main color you’re working to capture it, but I’ve found that causes more tightness in your project and it’s easier to cause puckering.
The video explains how to hold one color in each hand and how to catch the float from either the left or right hand. I hope this helps you with your next fair isle project.