Collapse Tree
Clicking this button collapses the data tree to its minimal size.
Data tree collapsed to its minimum:
If you want to collapse the data tree but keep one subgroup open, you can do this by clicking/highliting one of the elements in this subgroup and then collapsing the data tree:
1) Open tree with 'Crebelley' highlited in group 144
2) Collapsed data tree with group 144 still open
The opposite would be to expand the data tree.
