diff --git a/core/src/main/resources/lib/layout/expandButton.jelly b/core/src/main/resources/lib/layout/expandButton.jelly
index 5e36ec7a30dbac9b2a82d9ec0e2b2fd0c58b51b1..86a8a2e4a09ed955073a3a11753a84869b0d1a0f 100644
--- a/core/src/main/resources/lib/layout/expandButton.jelly
+++ b/core/src/main/resources/lib/layout/expandButton.jelly
@@ -1,6 +1,7 @@
 <!--
-  Expandable section that shows "advanced..." button by default.
-  Upon clicking it, a section unfolds.
+  Start off as a button, but upon clicking, it replaces itself
+  with the body of the tag. This works like <f:advancedButton />
+  but it is designed to be used outside a config form.
 
   Attributes:
   @title :   title of the button. required.