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Date: Wed, 23 Sep 2015 00:51:28 +0200 (CEST)
From: Roland Lutz <rlutz AT hedmen DOT org>
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Subject: Re: [geda-user] Apollon the technical thread
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On Tue, 22 Sep 2015, Stefan Salewski wrote:
> Yes -- I had only silk layer fonts in mind

Keep in mind that silk isn't fine art print--any structures smaller than 
the usual line width (10mil?) may come out damaged.  (Are there experience 
values for that?)  For this reason, true-type fonts really only make sense 
on copper layers.

> For what do we use copper fonts? I used the words "layer 0", "layer 1" 
> ... only to indicate correct orientation for the fab house.

I use copper text as poor man's silk when hand-prototyping.  Also, you may 
want to be able to identify a layout even when the silk is missing.

> But even fixed gerber fonts can be stored outside of the PCB file.
> Store only version number of fixed font inside of PCB file?

Rule of thumb, if something can go wrong, it will sooner or later go 
wrong.  If you want to make sure the letters *never* accidentally change, 
even not if someone in the distribution wants to be clever and "fixes" 
something in the font without adjusting the version number, then include 
the font in the layout file.  There's no easy way around that.