Quote Originally Posted by gmjapan
If you have actually assigned them to a group i.e. Ctrl+1 then the "unit formations" button will be available in the bottom right of the screen.

If you click it a new set of buttons will appear letting you set all the groups unit in a single line (or double line or archers to the back or cav to the front or whatever)

All for 2 clicks of the mouse! Sweet eh?

Really? I never knew that. Thanks for the tip!