Settings

Create a config/stack.php file:

<?php

use craft\helpers\App;

return [
  // 'prefix' => '@',
  'namespaces' => [
    [
      'handle' => '{site.handle|lower}',
      'path' => 'sites/{site.handle|lower}',
    ],
    [
      'handle' => '{group.name|lower}',
      'path' => 'groups/{group.name|lower}',
    ],
    [
      'handle' => 'global',
      'path' => '_global/{env}',
      'context' => [
        'env' => App::devMode() ? 'dev' : '',
      ],
    ],
  ],
];

Setting	Default	Description
prefix	@	The prefix of namespace handles in static resolution.
namespaces	[]	The list of namespaces. Without any, the plugin doesn’t resolve templates.

Each namespace supports these keys:

Key	Description
path	The template folder, relative to your templates folder.
handle	Optional. Needed for static resolution.
context	Optional. Variables for the object templates of handle and path.

The order of the namespaces matters for dynamic resolution.