code: @Override
    public boolean centerRootTopicIfFocusedMMD() {
      boolean result = false;
      final TabTitle title = this.getFocusedTab();
      if (title != null && title.getProvider().getEditor().getEditorContentType() == EditorContentType.MINDMAP) {
        SwingUtilities.invokeLater(new Runnable() {
          @Override
          public void run() {
            ((MMDEditor) title.getProvider().getEditor()).rootToCentre();
          }
        });
  
        result = true;
      }
      return result;
    }
docs: GEN-LAST:event_menuOpenFileActionPerformed