Create a New Template from Project

I would like to be able to set a project I have made to be a template for future projects, I suppose this must be possible because it says on

There are two types of project templates:

ok, so assuming I am in a group with premium access and I am on the admin page for my group and I have a project somewhere called projectX - what things do I click to get to a page where I can create a template or turn projectX into a template. I’m asking here because the documentation seems to be relying on my knowing what is meant by the instance tab and so forth without providing an helpful pictures or anything.