>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3574514. --> Reported by: [gábor hojtsy](https://www.drupal.org/user/4166) Related to !621 >>> <h3 id="overview">Overview</h3> <p>There is no documentation on what exposed slots are.</p> <h3 id="proposed-resolution">Proposed resolution</h3> <p>Document them.</p> <h3 id="ui-changes">User interface changes</h3> > Related issue: [Issue #3519352](https://www.drupal.org/node/3519352)