Does napping after a meal impede digestion?

I’ve heard that eating a big meal makes one want to take a nap. I’ve also heard that laying down in bed after eating a meal slows down digestion. Further, I’ve been told that one should stay awake or at least snooze in a recliner in the sitting position rather than laying flat, or horizontally as in a bed after eating. So, does laying down for a nap slow down digestion?