'fieldset', '#title' => 'Biological Data Layout', '#collapsible' => TRUE, '#collapsed' => TRUE, ); $form['tripal_fields']['new_pane'] = array( '#type' => 'textfield', '#title' => 'Add a new pane', '#description' => 'Panes can be used to organize related fields. You may create as many panes as desired. Once a pane is created you can use the interface above to move fields into an appropriate pane. ' ); $form['tripal_fields']['new_pane_button'] = array( '#type' => 'button', '#name' => 'new_pane_button', '#value' => 'Add', ); }