What does the notation "M" mean?
I've looked into a video and a page and they contradicted each other.
The M rotates the middle of the cube vertically, but do you rotate it upwards or slide it downwards?
Thank you.
Here's an example. In the top left corner, if I use "M" on it, initially having the green side as the front, what colour would be my new front side? White or yellow?
Thank you!