LA allows you to view and set a servers config files (postgresql.conf and pg_hba.conf) remotely and
to tell the server to reload it's settings.
NOTE: To use this functionality you must have the admin module installed.
The win32 version of Postgresql ships with this module but most Linux/Unix ones do not.
You can obtain the Linux/Unix version of the admin module here:
http://www.pgadmin.org/download/adminpacks.php
To access this functionality right click on a connected server in the Enterprise Manager:
You will then see the Server Settings dialog which is divided into two tabs:
Configuration (postgresql.conf)
Client Authentication (pg_hba.conf)