Expanding and Collapsing the Specification Tree

Select View > Tree Expansion > Expand First Level to see the first level of the tree:

Select View > Tree Expansion > Expand Second Level to see the second level of the tree:

Select View > Tree Expansion > Expand All to see all the levels of the tree.

When an object is selected in the tree, you can select View > Tree Expansion > Expand Selection. A dialog box opens and prompts you to indicate the expansion depth:

Important: Depth "1" means that only one row is displayed; it has the same behavior as the Collapse All command. Depth "2" means that only two rows are displayed; it has the same behavior as the Expand First Level command. Depth "3" means that only three rows are displayed; it has the same behavior as the Expand Second Level command. Note that the dialog box keeps the last selection you made.

Select View > Tree Expansion > Collapse All to collapse the whole tree.

When using the Collapse All command, not all expansion behaviors are kept and the expansion level (i.e. the number of levels expanded after one click) of nodes when you reopen the tree is modified: when you run the Collapse All command on nodes corresponding to first-level features, the nodes are always restored to a collapsed state whatever their state before running the command. The expansion level of nodes can be changed by exporting the CATExpandOneLevel environment variable. If this variable is set after using the Collapse All command, then the expansion level of each node is set to 1. This means that you will only expand one level when clicking tree nodes.