Live 12 - Increasing Vertical Height of Folded Group Tracks?

[unattained]

Some of my folded group tracks have more vertical space than others. In other words, on some of my folded groups I can see track activate, solo, arm, track volume, routing, panning, sends, etc, and on others I can only see activate, solo, and arm.

When I drag the vertical separator of the folded groups down it just unfolds them, and I haven't found any hotkey I can use in combination with dragging that increases the size instead of unfolding. I don't know how I managed to increase some of the groups, but I would really like to be able to see track volume on all of them. How can I increase the height of folded tracks without unfolding them, so that I can see the volume on all my folded tracks?

Thanks in advance for any insight or assistance!