Snapping down the rise of a OSFM nappy: up or down?

You know that fold of fabric created when you snap down the front of a one size cloth nappy to adjust its size? Have you ever wondered whether there's a 'right' direction to fold it?

Love this little video from GroVia  demonstrating that folding it up is generally better than down - it creates less bulk and a better fit across the thighs. And yes, this is the case for most nappies with an adjustable rise.

 

GroVia One Size Diapers - Rise Direction from GroVia on Vimeo.