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Precedence: bulk

> > 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.

I think only difference between copper font and silkscreen font is the layer, they both en up in gerber. Or I am wrong?

> > 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.

For gerber files I would say fonts should be stored inside each file.