Set the extension you want to use for your content files.
return [ 'content' => [ 'extension' => 'md' ] ];
Set an array of file/folder names that are not scanned by Kirby's core.
return [ 'content' => [ 'ignore' =>  ] ];
Deactivate the content locking mechanism used by the Panel to prevent concurrent edits to a page, file or user:
return [ 'content' => [ 'locking' => false ] ];