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Subject:	Re: [geda-user] Declare a pin as GND in symbol
From:	Stefan Salewski <mail AT ssalewski DOT de>
To:	geda-user AT delorie DOT com
Date:	Tue, 11 Mar 2014 23:11:32 +0100
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On Tue, 2014-03-11 at 17:48 -0400, Rob Butts wrote:
> I couldn't find the answer in the symbol guide.
> 
> I made a symbol for an 8-pin soic component that has a thermal pad under
> the chip that is recommended to connect to ground.  I don't want to show
> the pin on the symbol but want to declare that hidden pin as a GND:1 net
> connection.
> 
> I've seen it in symbols but can't find how to do it.

You may see

http://wiki.geda-project.org/geda:na_howto

Older logic symbols often have attributes like

less /usr/share/gEDA/sym/74/7400-1.sym
T 500 2850 5 10 0 0 0 0 1
net=Vcc:14
T 500 3050 5 10 0 0 0 0 1
net=GND:7

Not all people love hidden pins -- and of course you will need a
footprint with central pin with matching name/number.

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