Stacked Units

A group of (air) units are stacked when their are clumped in a tight blob, and they occupy less space.

To stack a group of (air) units, select them and issue the move or attack-move command targeting a location or a unit that is within the area.. what area?.

When a group of stacked units is issued the stop or hold position command they will spread apart until no two of them are stacked any more.

Stacking units has pros and cons.

The main pro is that it allows for all your units to attack any single target of your choice at the same time.

The main con is that it AoE spells and splash damage attacks are more efficient against stacked groups of units.