You can draw a units formation much the same way it was done in STW...select the unit card and then R-click while drawing out the formation. You can do this for multiple units at the same time by using CTRL+left-click (selecting all the units you wish) and then right-click while dragging out the new position.

To change facing, select the unit (left-click on the unit card or the unit itself on the battlefield), and use the < and > keys to rotate the unit without changing its position.