This optional clause allows you to display a field value in two different formats or together with a label of some kind. It must immediately follow the call to the primary Format Method. The result of the second Format Method is displayed after the first one with a space separating them.
The ALSO clause works well when you want to display a field value and add a unit specifier to it, as in:
FIELD port_speed (Fixed 2 Bytes) (Decimal) ALSO (Constant "bps")