You can get the Response Headers from the HTTP Request Activity ,
where the variable will be of dictionary type
In order to retrieve data from all the output response headers you can use a for each activity ,This will print all the output headers.
Then if you choose to get values from any one particular key values from the dictionary
you can use opHeader.ElementAt(4).Key+" is " +opHeader.ElementAt(4).Value
where 4 is the index of the dictionary value, you can choose any number here for the index depending on what header value you require , where index starts from zero .Hope this answers to your question!
Happy Automating!