title: how to pre-fill select box in typo3 backend
body: <p>First of all excuse my bad english.</p>
  
  <p>I got a problem with my select-field in the BE. I would like to prefill (preselect) all of the available items. </p>
  
  <p>Code in ext_tables.php:</p>
  
  <pre><code>'teilnehmer' =&gt; array(
          'exclude' =&gt; 0,
          'label' =&gt; 'LLL:EXT:kiwanisext/Resources/Private/Language/locallang_db.xlf:tx_kiwanisext_domain_model_veranstaltung.teilnehmer',
          'config' =&gt; array(
              'type' =&gt; 'select',
              'foreign_table' =&gt; 'fe_users',
              'MM' =&gt; 'tx_kiwanisext_veranstaltung_user_mm',
              'size' =&gt; 10,
              'autoSizeMax' =&gt; 30,
              'maxitems' =&gt; 9999,
              'multiple' =&gt; 0,
              'wizards' =&gt; array(
                  '_PADDING' =&gt; 1,
                  '_VERTICAL' =&gt; 1,
                  'edit' =&gt; array(
                      'type' =&gt; 'popup',
                      'title' =&gt; 'Edit',
                      'script' =&gt; 'wizard_edit.php',
                      'icon' =&gt; 'edit2.gif',
                      'popup_onlyOpenIfSelected' =&gt; 1,
                      'JSopenParams' =&gt; 'height=350,width=580,status=0,menubar=0,scrollbars=1',
                      ),
                  'add' =&gt; Array(
                      'type' =&gt; 'script',
                      'title' =&gt; 'Create new',
                      'icon' =&gt; 'add.gif',
                      'params' =&gt; array(
                          'table' =&gt; 'fe_users',
                          'pid' =&gt; '###CURRENT_PID###',
                          'setValue' =&gt; 'prepend'
                          ),
                      'script' =&gt; 'wizard_add.php',
                  ),
              ),
          ),
      ),
  </code></pre>
  
  <p>I found nothing helpful in the documentation. </p>
  
  <p>Any hint, tip or help will be much appreciated! </p>