Add some custom fields to a page

I use customPress to create some custom fields and I've seen that we can link a custom-field to a custom-post type. But what I want to do is to link a custom field to a particular page. Not all the pages, but just the contact page...

I've also seen that when I create a custom-post type, it is automatically added to the subsites when a subsite is created. Is it possible to do the same with the pages ? I mean I want some pages to be created at the same time of the subsite creation.

Thanks :slight_smile: !