You can look at the kendo demo itself, click "Export to PDF", and you'll see the button. It's not this way in the Kendo Grid though.
Could you please be more specific and share more details? As far as I can see both buttons on Export to PDF TreeList and Export to PDF Grid are identical. The only difference is that the button on the first one uses <button> tag while the latter used <a> tag
Is that the difference you are reffering to?