Seasons theme collection page

I am wanting to customize the page that shows when you go to a collection. I am finding information about a folder called collections with a file called show.php but the Seasons theme doesn't seem to have this.
I tried just uploading the collections folder from the "fromscratch" theme but that caused an error…
What file is determining the appearance of the collection page if there is not a collections > show.php file in the theme?

Thanks!

You'll want to copy the default theme files. Here's a guide to doing that.

thanks you!