I would love the ability to record the "Collapse groups" shortcut John Nack mentioned here:
http://blogs.adobe.com/jnack/2011/06/... in my actions.
In my actions I often create lots and lots of folders that I'll need afterwards (workflow actions), which then stay open all the time so I have to collapse them manually.
Therefore it'd be great to be able to record the collapse command to save time and improve the overview over my layers/groups.