Simply write it under the table component would be good enough

<div>
  <ComponentToPrint ref={el => (this.componentRef = el)} />
  <ReactToPrint
    trigger={() => <a href="#">Print this out!</a>}
    content={() => this.componentRef}
  />
</div>

Here is the code from sandbox

So how would I put the link button Print this out! under the table?
could I customize it according to my own design by using CSS?