Hi Kiran,
Here you need to check for the context node type. We can find those details from the view.
I will explain you with an example:
Now we want to add a field in the Employee search result. But in the popup we will not have the AET option. So if we check from the view details and came to know that BuilHeader is the object.
So we can go to Employee page where we will have the AET option and extend it.
After adding there same new field will be avail in the popup also so we can add it to the Employee search popup result also
I hope you got what I am trying to explain.
Regards,
Ravi