diff --git a/tree-style-tabs-new-tab-button-bottom.html b/tree-style-tabs-new-tab-button-bottom.html
index 04e7a5b..60adfc2 100644
--- a/tree-style-tabs-new-tab-button-bottom.html
+++ b/tree-style-tabs-new-tab-button-bottom.html
@@ -33,6 +33,10 @@ Simply add the CSS code below to TST's custom style option ("Advanced" > "Extra
 #tabbar ~ .after-tabs {
   display: flex !important;
 }
+
+:root {
+  --after-tabs-area-size: 20px;
+}
 </pre>
 
 </article>