How can I use the print-friendly feed to print individual records?

<p>I have created the print-friendly feed successfully and have tried to follow instructions from a similar post, but with no luck. My print-friendly button is working properly from the detail view, but it displays all records--not just the one associated with the given record. I tried appending &amp;pk=[[PrimaryKey]] onto my feed url, based on the example in another question, but did not work. </p>