diff --git a/boards/static/css/base.css b/boards/static/css/base.css
--- a/boards/static/css/base.css
+++ b/boards/static/css/base.css
@@ -13,7 +13,6 @@
 
 .img-full {
     position: fixed;
-    z-index: 9999;
     background-color: #CCC;
     border: 1px solid #000;
     cursor: pointer;
diff --git a/boards/static/js/image.js b/boards/static/js/image.js
--- a/boards/static/js/image.js
+++ b/boards/static/js/image.js
@@ -85,7 +85,10 @@ function addImgPreview() {
 
                     return false;
                 }
-            ).draggable()
+            ).draggable({
+                    addClasses: false,
+                    stack: '.img-full'
+                })
         }
         else {
             $('#'+thumb_id).remove();