(1) Go to the Fiori UI where you would like to enhance, and enter adaptation mode by clicking this icon:
(2) Click "Adapt UI":
(3) Choose "Add Field" in context menu:
(4) Choose the extension field you want to add in "Available field list":
Exit the adaptation mode, and the new field will be there.
use GRE/210 as gateway system, and XT9/715 as backend system.
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如何使用Key User Tool扩展SAP S/4HANA Fiori UI
原文：https://www.cnblogs.com/sap-jerry/p/12241374.html