diff --git a/themes/hugo-w2ng/layouts/shortcodes/annotate.html b/themes/hugo-w2ng/layouts/shortcodes/annotate.html
new file mode 100644
index 0000000..01c299d
--- /dev/null
+++ b/themes/hugo-w2ng/layouts/shortcodes/annotate.html
@@ -0,0 +1,6 @@
+<span class="inline-block relative">
+    <sup>...</sup>
+</span>
+<span class="absolute w-64 border bg-blue-400  hidden inline-block">
+    {{ .Inner | $.Page.RenderString }}
+</span>