List all post titles in Archives

How do I list all the post titles in a certain category or month on the Archives page? I was able to eliminate the excerpts and whole entries and just retain the entry titles, but on the Archives page, I can only see two of the most recent entries.

How do I get all of the entries in that category to show? Do I need a plugin?

The blog link is http://audreytautouonline.net/press/

Thank you in advance.