How do you add additional signal layers to an existing library?

Question

I created several packages in a custom library to evaluate the Eagle Freeware version (limited to two signal layers). I have since upgraded to allow up to 6 signal layers.

I understand how to change the number of signal layers for the actual PCB editor through the Design Rules, but this does nothing for any existing library packages created in the Freeware Version.

My current workaround is to simply copy all layers to a completely new package in a completely new library (that now shows 6 available signal layers), but this seems unreasonable. What now happens if I upgrade to allow up to 16 signal layers?

Sorry if I have missed something trivial.

autodeskguest · Accepted Answer

On 25/08/14 09:34, Chris Engberg wrote:

In a library package created in Eagle Freeware, a package has 2 copper
layers. In the Hobby version a package has 6 layers. I assume the full
version has 16.

In the libraries supplied by CadSoft for the professional version, there

are only two copper layers, because this is the normal usage of libraries.

But if I view a Freeware-created library in the Hobbyist version, it
still has 2 copper layers. For the life of me I can't figure out how to
show the other 4...

Have you tried "set used_layers"?

Cheers,

Rob

autodeskguest · Answer

On 25/08/14 06:18, Chris Engberg wrote:

I understand how to change the number of signal layers for the actual
PCB editor through the Design Rules, but this does nothing for any
existing library packages created in the Freeware Version.

How do you add additional signal layers to an existing library?

Why are you putting signal layers in a library?

In normal use, a library contains components with footprints that

include the pads to solder to. It's rather hard to imagine how one would

solder to a pad on an inner layer!