diff --git a/doc/contributions.txt b/doc/contributions.txt
index bf907708078dc1ed3e5435b3323139654240640e..850b7469fbf969a5621b634f004889a83b5d1631 100755
--- a/doc/contributions.txt
+++ b/doc/contributions.txt
@@ -261,6 +261,7 @@ Benjamin Bigdipper
 Beth Walcher
 Beq Janus
 	SL-10288
+	SL-13583
 Bezilon Kasei
 Biancaluce Robbiani
 	CT-225
diff --git a/indra/newview/skins/default/xui/en/floater_model_preview.xml b/indra/newview/skins/default/xui/en/floater_model_preview.xml
index 9c1a9d288011911de479e34af8eb4182df1fc150..02a21764cee30b937980f7312007654936340e0f 100644
--- a/indra/newview/skins/default/xui/en/floater_model_preview.xml
+++ b/indra/newview/skins/default/xui/en/floater_model_preview.xml
@@ -1331,7 +1331,7 @@
         <view_border
          bevel_style="none"
          follows="top|left"
-         height="306"
+         height="289"
          layout="topleft"
          left="3"
          name="log_tab_border"
@@ -1345,7 +1345,7 @@
          font="SansSerif"
          ignore_tab="false"
          layout="topleft"
-         height="306"
+         height="289"
          left="4"
          top="0"
          right="-1"
@@ -1356,6 +1356,14 @@
          read_only="true"
          word_wrap="true">
         </text_editor>
+        <check_box
+         control_name="ImporterDebug"
+         follows="top|left"
+         top_pad="9"
+         left="6"
+         width="70"
+         label="Enable detailed logging"
+         name="verbose_logging"/>
       </panel>
     </tab_container>
     <panel