... You know, I *think* that's ALT+Right click when you move them, but I'm not sure. I do know that ALT+Right Click when you attack is Secondary Weapon .... When you try it, hold the Spacebar, as that lets you see how the units will be when they stop moving.
"Akira! Oh, how that lonesome sound brings me back. At the end, I am an anime otaku at heart." "... What?"