Map the card binding expressions to content
Each binding expression in the JSON definition of a widget card template will create a sub-node of the widget card template in the explorer. The explorer is filled automatically when the JSON is uploaded the first time to the Content attribute of the widget card template. You can change the JSON any time later. If your changes include binding expressions, right-click the widget node and select Rescan Adaptive Card Variables.
Binding expressions can be filled with fixed values for all widget card templates. For the widget card templates used for indicator cards and data workbench visualization, binding expressions can be mapped to different dynamic content derived from the current indicator values or the user settings in the data workbench visualization.