How to customize default InfoTemplate

[庆龙赵]

Hi, everyone!

Now I meet a problem.

When I click a feature, the webapp will popup a InfoTemplate to show this feature`s attribute.

I want to customize this InfoTemplate to show something which is not in feature attribute table.

I konw how to do with ArcGIS  API for JS, but I don`t know how to do this in WebAppBuilder.

I really hope you can tell me how to do this.

Thank you very much!

(My English is not very good, I`m so sorry.)