Almost all configurable data is placed in :file:`config.inc.php`. If this file does not exist, please refer to the :ref:`setup` section to create one. This file only needs to contain the parameters you want to change from their corresponding default value in :file:`libraries/config.default.php`.
The parameters which relate to design (like colors) are placed in :file:`themes/themename/layout.inc.php`. You might also want to create :file:`config.footer.inc.php` and :file:`config.header.inc.php` files to add your site specific code to be included on start and end of each page.
Some distributions (eg. Debian or Ubuntu) store :file:`config.inc.php` in /etc/phpmyadmin instead of within phpMyAdmin sources.
:term:`Mac` users should note that if you are on a version before :term:`Mac OS X`, PHP does not seem to like :term:`Mac` end of lines character (\r). So ensure you choose the option that allows to use the *nix end of line character (\n) in your text editor before saving a script you have modified.
Server connection settings
Cookie authentication options
Navigation panel setup
Export and import settings
Tabs display settings
Web server settings
SQL query box settings
Web server upload/save/import directories
Various display setting
Theme manager settings
SQL parser settings
SQL validator settings
These settings might have huge effect on performance or security.