Selecting units in a stack

Hi to all.

Is there a way to prevent more than one unit is selected in a stack?

Thank you.

Panther 2010

If you triple-left click a stack of units you will “accordion expand” the stack, and then, with the next click be able to select the desired unit.

If you click once on a stack, you will select ALL the units in it.

I do not know of a way to assign a characteristic to any piece or prototype that limits its interaction with other pieces in a stack…