Maybe I have this wrong but it appears to me that the user can only collapse a local (not the entire grid) hierarchy from a parent or grandparent, etc.
In the example below the user would have to be focused on AAA, BBB or CCC.
Example.
AAA
BBB
CCC
ddd
ddd
ddd
I'd like to be able to successively close 'ddd' right from that level (or any point in the hierarchy) so that -- for example --
<CTRL>+ - would collapse hierarchy to CCC level
<CTR:>+ - - would collapse hierarchy to BBB level
<CTRL>+ - - - collapse hierarchy to AAA level
The reverse would be true for expanding a hierarchy