You can browse across the tree. When you click on some node name (term) you see information dealing with related term described in the node of tree.  If you click on the arrow on the right of node name, you can see subnodes of the node (set terms related to the main term).

Another possibility is to search across the tree. You just need to write some first letters of required term. If written letters are in the beginning of some word in the node name (term) you will see all occurrences of the term in the tree. 

Examples: 

     authen    for authentication 
     author     for authority, authorities, authorisation
     righ         for right, rights
     defin       for definition, definitions
     ord          for order, orders 
     consu      for consumer, consumers
     deleg      for delegates, delegation

Click on X on the right of the search field finishes search.

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