How can I modify the code for a single page only?

Hi! I have a tracking page and I would like to add a tracking button from an app, but if try to edit the page. liquid file it adds the button also to evey other page that I have created. How can I add the code to only the specific page?

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Solved to problem. Crated a new page template > page.alternate.liquid and copied the code there. I used the templated for the page I wanted only.

What is the solution?

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Yes where is it?