Update

Author: vmpstr

css-shared-element-transitions-1/Overview.bs

@@ -103,7 +103,9 @@ Each of the groups is comprised of up to four pseudo elements:
     outgoing image, the contents can be manipulated with ''object-*'' properties.
     Note that because this element's snapshots are taken from the pages output,
     the visual output changes if the visual output of the represented element
-    changes. This is similar to how an 'element()' function would work.
+    changes. This is similar to how an '<a
+    href="https://w3c.github.io/csswg-drafts/css-images-4/#element-notation">element()</a>'
+    function would work.
 
 ISSUE: This sections can benefit from diagrams.