As well as the settings visible in the GUI, there are a few config files for more specific needs:

shimmie.conf.php

Various aspects of Shimmie can be configured to suit your site specific needs via the file data/config/shimmie.conf.php (created after installation).

Take a look at core/sys_config.php for the available options that can be used.

Custom User Classes

User classes can be added to or altered by placing them in data/config/user-classes.conf.php.

For example, one can override the default anonymous "allow nothing" permissions like so:

new UserClass("anonymous", "base", [
	Permissions::CREATE_COMMENT => True,
	Permissions::EDIT_IMAGE_TAG => True,
	Permissions::EDIT_IMAGE_SOURCE => True,
	Permissions::CREATE_IMAGE_REPORT => True,
]);

For a moderator class, being a regular user who can delete images and comments:

new UserClass("moderator", "user", [
	Permissions::DELETE_IMAGE => True,
	Permissions::DELETE_COMMENT => True,
]);

For a list of permissions, see core/permissions.php

In version >2.9.2, namespace Shimmie2; is required to be at the top of data/config/user-classes.conf.php.