As a reminder for Mr. Wilson, preparing a bug list:

The display of "multilayer" objects is seriously flawed. Protel displays 
"multilayer" objects only if multilayer is enabled. Vias are multilayer 
objects as currently configured, but vias do not necessarily exist on all 
layers, they could be blind or buried.

There is presently no way to see only the vias on a single layer or partial 
collection of layers, all vias are either hidden or unconditionally shown 
even if they do not exist on the layers in question.

Single layer mode, I'd suggest, should display multilayer objects unless 
they do not exist on that layer. It is possible that it would be best to 
display the presence of a multilayer object on a layer even if "multilayer" 
is turned off. This is because a multilayer pad *does* live on top and 
bottom and all copper layers, for example. Better development of the 
padstack concept could eliminate the need for "multilayer" entirely, except 
that it is good to be able to quickly distinguish between a single-layer 
pad and one which lives on more than one layer.

The blind/buried via aspect of this is crucial in order to make working 
with blind and buried vias practical.(It is now possible, but one must 
constantly be factoring for the display problem. It is tedious and 
difficult.) The display of other multilayer objects would be an improvement 
and might be accomplished by the same changes that would fix the 
blind/buried via problem.
[EMAIL PROTECTED]
Abdulrahman Lomax
Easthampton, Massachusetts USA

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