Is there any way to reselect a group?

[pirey4]

I'm playing on a Macbook Air using the single button trackpad. To left click the trackpad, you press down with 1 finger and to right click you press down with two. On multiple occasions, I have accidentially de-selected grouped units by pressing down the wrong number of fingers. Is there any way to reselect the group so that you can continue to move the previously selected group without having to start over by regrouping? If you have to regroup, you may not be able to add units that have moved because they may be more than 1 space away.

[ericbabe]

There is no interface for this, sorry.