To move terms from one place to another:
On the Search Workbench tab, select Dictionaries from the Show menu.
In the Dictionaries menu, select Term Dictionaries > Your Dictionary.
Right-click the term to copy or cut it.
Right-click the place in the term hierarchy under which you want to paste the moved term. You can paste the moved term either at the same level as the selected term, or as a child of another term.
