To transition through various floor work, including splits, make an effort to sweep your legs instead of stepping through. Sweeping the legs is more graceful than stepping. Sweeping also makes your movements bigger. Bigger generally equals better in dance.
To sweep your leg, extend it out to the side keeping your knees as straight as possible. If you are on your side, you will sweep the top leg first. If you are in your splits, you will sweep with your back leg.
I love this kid’s video about how to use a leg sweep as a transition. I actually didn’t find a lot of other resources for this tip though.