Oxygen – print a post

I am trying to add a kind of “print button”.
At the moment i inserted this very easy code, that i put in the “afer singular”.

Stampa la ricetta

(see https://www.ricettedelcuore.it/involtini-di-bresaola/)

The problem is that I would like to print only the post (and not the whole page). Maybe should i put it in the proper php?

Thank you