diff --git a/pdf_pages.php b/pdf_pages.php
index 7457aca59c..f17593203d 100644
--- a/pdf_pages.php
+++ b/pdf_pages.php
@@ -529,8 +529,8 @@ function resetDrag() {
     <input type="checkbox" name="show_color" id="show_color_opt" checked="checked" /><label for="show_color_opt"><?php echo $strShowColor; ?></label><br />
     <input type="checkbox" name="show_table_dimension" id="show_table_dim_opt" /><label for="show_table_dim_opt"><?php echo $strShowTableDimension; ?></label><br />
     <input type="checkbox" name="all_tab_same_wide" id="all_tab_same_wide" /><label for="all_tab_same_wide"><?php echo $strAllTableSameWidth; ?></label><br />
-    <input type="checkbox" name="with_doc" id="with_doc" checked="checked" /><label for="with_doc"><?php echo $strDataDict; ?></label>
-    <br />
+    <input type="checkbox" name="with_doc" id="with_doc" checked="checked" /><label for="with_doc"><?php echo $strDataDict; ?></label><br />
+    <input type="checkbox" name="show_keys" id="show_keys" /><label for="show_keys"><?php echo $strShowKeys; ?></label><br />
     <label for="orientation_opt"><?php echo $strShowDatadictAs; ?></label>
     <select id="orientation_opt" name="orientation" <?php echo ($cfg['WYSIWYG-PDF'] ? 'onchange="refreshDragOption(\'pdflayout\');"' : ''); ?>>
         <option value="L"><?php echo $strLandscape;?></option>