Rotating all frames in a document?

I've seen posts asking if this is possible, followed by a simple answer - yes.
So how? This could be very useful for me, as I won't have to rotate every frame one at a time.
To further explain, here's an example  ;)



Here is one of many animations I'd like to rotate. Obviously squares are not hip in today's pixel art, so it must be a diamond!  :p
The only other editors I use that rotate every frame, doesn't seem to do it with pixel perfect perfection.
Here's an example of the only rotation I've been able to create with other editors:



I must add - wow, diamonds really do make everything better.
This is the result I'd like, but looking closer you can see each edge is outline by a blur created by the software. Assuming this is some kind of anti-alias of sorts that supposed to make it look better, but hey, this is pixel art, HOW DARE YOU!?

Anyway, I hope you understand what I'm getting at. Anyone know how to do this in Pyxel Edit?