Update what-are-cards.md

msteams-platform/task-modules-and-cards/what-are-cards.md

@@ -91,7 +91,7 @@ You must design your Adaptive Cards to look great on any device to provide an en
 
 ## Overflow menu on Adaptive Cards
 
-Adaptive Card in Teams supports overflow menu. You can populate an overflow menu for all the secondary actions in an Adaptive Card.
+Adaptive Card in Teams supports overflow menu. You can populate an overflow menu for all the secondary actions in an Adaptive Card. For more information, see [Adaptive Cards overflow menu](cards/cards-format.md#adaptive-cards-overflow-menu).
 
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