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Date: Mon, 3 Mar 2014 21:36:23 +0100
From: Gabriel Paubert <paubert AT iram DOT es>
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Subject: Re: [geda-user] Update a footprint in PCB without replacing parts?
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On Mon, Mar 03, 2014 at 01:49:29PM -0500, Rob Butts wrote:
> I have a layout done but many of the footprints solder masks are too big.
> I'd rather not have to do Shift-Ks on each pad.  Can I change the footprint
> definitions and have PCB recognize the changes without having to
> delete-save-gschem2pcb-add said components?

Apart from the suggestions given elsewhere (hand editing, reloading the file),
another possibility under the GUI is:

- make only the pins/pads visible (hide layers, silkscreen, vias)

- show the soldermask layer

- select all the pins/pads of the same size, very often this can be 
  done quickly by selecting an area

- use the command line interface ":" and type:
   changeclearsize(selected,new_value)

where new value, could be 0.375mm for a 0.6mm pad (this gives 75um clearance).

Annoyingly, the interface for solder mask value is different from
the interface for copper clearance: you have to enter half the radius
of the solder mask (for a circular pin) or half the width for a 
square or rectangular pad.

	Gabriel