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In the Integrations pane of the Home tab, select the integration that you want.
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Click the property page that you want (integration property page or action property page).
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In the Properties pane, locate the desired property that includes the Insert Variables controls. 
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Click
to open the Insert Variable dialog.
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在“插入变量”对话框左侧的“导航”窗格中,选择“全局”以为所选集成显示所有预定义和自定义全局变量的单个列表。