Scale content on iframe

Hi everyone,

So what I want to do basically is to iframe a specific section of a website. This is already working for me with this code :

Twicking this allows me to use the iframe to view any part of the other website.

What I would like to do is to zoom what I’m seeing in the other website.
I found some information but I don’t know how to use it.

Could someone help please?

Thank you so much.