There are two specific manoeuvres that enable a unit to change direction or rearrange its ranks: wheel and reform.

As with a normal move, a unit cannot carry out a manoeuvre if doing so would ends its move within 1" of another unit.

Also, none of the models in the unit may move more than twice their Movement rate as a result of a manoeuvre (i.e. models with Move 4 can move up to 8").