diff --git a/www/whiteboard/app-whiteboard.less b/www/whiteboard/app-whiteboard.less
index a4237cbdf..210da403b 100644
--- a/www/whiteboard/app-whiteboard.less
+++ b/www/whiteboard/app-whiteboard.less
@@ -130,14 +130,18 @@
                 label {
                     margin-bottom: 0;
                     margin-right: 5px;
+                    flex: 1;
                 }
 
                 input[type="range"] {
                     background-color: inherit;
                     margin-right: 5px;
+                    width: 150px;
+                    padding: 0;
                 }
 
                 & > span {
+                    width: 50px;
                     cursor: default;
                 }
             }