diff -r bdf851bb1c4f -r 48235ed6b07d client/css/renkan.css
--- a/client/css/renkan.css	Wed Jun 03 19:16:58 2015 +0200
+++ b/client/css/renkan.css	Thu Jun 04 10:04:01 2015 +0200
@@ -532,7 +532,7 @@
     top: 0;
 }
 
-.Rk-ZoomIn, .Rk-ZoomOut, .Rk-ZoomFit, .Rk-ZoomSave, .Rk-ZoomSetSaved {
+.Rk-ZoomIn, .Rk-ZoomOut, .Rk-ZoomFit, .Rk-ZoomSave, .Rk-ZoomSetSaved, .Rk-ShowHiddenNodes {
     width: 21px; height: 20px; background: url(../img/zoombuttons.png); margin: 5px;
 }
 .Rk-ZoomIn:hover {
@@ -562,6 +562,12 @@
 .Rk-ZoomSetSaved:hover {
     background-position: -84px -20px;
 }
+.Rk-ShowHiddenNodes {
+    background-position: -105px 0;
+}
+.Rk-ShowHiddenNodes:hover {
+    background-position: -105px -20px;
+}
 
 /* Bins */