There are many terms with the same name but different definitions, and they are listed as
(1),
(2),
(3), etc.
(1), (2), (3), Etc.
To insert (1), turn bold on (Ctrl-B), type (1), then Ctrl-N to return to normal. However, Alt-2 inserts a PT2 tag already boldfaced. For (3), (4), etc., manually change the 2 to 3, 4, 5, etc.