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You can find some of the the 'Collapse' & 'Expand' commands under the View Menu. Here they are (I found them in 'Keyboard Commands' in the Help menu):

* Command+9 - Expand Row - expands the children of the selected row.
* Command+0 - Collapse Row - collapses the children of the selected row.

* Command+Option+9 - Expand Row Completely - expands all the children, grandchildren, etc of the selected row.
* Command+Option+0 - Collapse Row Completely - collapses all the children, grandchildren, etc of the selected row.

* Command+Control+9 - Expand All - expands all the rows, and their children, etc of the *hoisted* section.
* Command+Control+0 - Collapse All - collapses all the rows, and their children, etc of the *hoisted* section.


James B