I saw Board setup control file, which suggests configuring your board using a template file. Are there existing template files that provide the correct configuration for various production houses? I use JLCPCB, it would be nice to be certain that I am using their capabilities efficiently. I suppose it would need 1-layer, 2-layer, 4-layer and multi-layer versions.
Tom
It’s an old idea and here’s a shelved repo: Project templates for selected fabs The latest commit across all clones is 2 years old.
It would be better if in future the production houses could maintain config files themselves, via a content plugin.
Agree best solution would be for fabs to provide their own template/config file.
One thing…I would forget about 1-layer. I do not remember seeing that from JLCPCB.
I did design 1 or 2 single layer boards when I worked in Thailand about 25 years ago. I think those were made on phenolic material rather than FR4.
They do the metal backed and ceramic exotica
Ahh…OK. (Added characters to meet any minimums.)
The JLCPCB front page gives you a choice of 1, 2, 4, 5 … and of course you can have other numbers, once you get inside
OK; color me “surprised”. I would say that I stand corrected but I am seated at the moment. 
It’s actually 1, 2, 4 and 6 (not 5). Other layer options are indeed pretty much all even numbers up to 32)