Blade upside-down ... install direction?

Okay, so I ordered some soap a brush razor and blades...just waiting for them to arrive. The only question I really have, is there a proper direction to orient the blade when installing on the razor? Can the blade be installed upside-down or is it symmetrical?

Welcome to B&B.

I assume you are talking about DE razors. You can install them any way you want as long as they fit in the razor.

Welcome to B&B . No it does not matter, and if your blades have numbers on them, they don't matter either.
Remember to use no pressure.

Oh the waiting is the hardest part...