How can I toggle the individual visibility of multiple layers in a pdf?
I have a pdf which contains over a thousand layers all of which are visible. I wan to turn all of these off so that I can then just make visible those which I need to see. I know I can toggle groups of layers, but what I need to do is change the visibility of each individual layer to off. It doesn't seem that I can mark multiple layers in any way and I dont really fancy having to go down a long list of layers switching each one off individually!
