...
The Equipment Classification Code window contains two panes: on the left, a tree view that shows the hierarchical arrangement of the codes; and, on the right, a table view that provides information about each code. The tree view is expanded by clicking the plus sign 
or contracted by clicking the minus sign (–).
When an equipment type is selected in the tree view, the record corresponding to that item is highlighted and displayed in the table on the right. Selecting a record also selects a node in the tree view. Right-click a row in the table view pane or a node in the tree view to display the shortcut menu. This menu contains the following command in addition to the common commands:
- Add Branch: This command adds a new, subordinate node to the tree view and a corresponding row in the table view. See Insert a New Equipment Class Code for more information.
...