How to rotate an army given a specific formation?

[DEB8]

Further to my previous post - if you want to move backwards and rotate ( or rotate and move backwards ), it's best ( IMHO ), to do a forward rotate first and an "Alt" formation move backwards second ; but always ensure the backwards move point is roughly ( 180° ) behind the centre of your army or you could end up with the Flanks switching and maybe actually facing backwards...

[ReluctantSamurai]

Point taken, still...it's just easier, and one is less likely to make a mistake, to right-click/hold, then draw out where you want everyone to go. You can press the spacebar, even while the move is in progress, to check the final position

[DEB8]

For some reason, I have never had much luck with that method with a group of units ( particularly in Woods ... ), so I tend to avoid it.
Each to his own.