docs/de/developers.md

@@ -6,4 +6,5 @@
 - [Basket Small Template Events](/quiqqer/orders/wikis/dev/smallBasket/templateEvents)
 - [Add custom messages to the order process](/quiqqer/orders/wikis/dev/customOrderProcessMessages)
 - [Send order confirmation mail console tool](Home/Send-order-confirmation-mail-console-tool)
-- [Order Process API](/quiqqer/orders/wikis/dev/orderProcessApi)
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+- [Order Process API](/quiqqer/orders/wikis/dev/orderProcessApi)
+- [Order-Panel erweitern (`order.xml`)](/quiqqer/orders/wikis/dev/orderProcessApi)
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