With Lascaux, making a layer for coloring is simple. You press the little button that looks like a white square on the layer menu to your left. And then, to make the layer transparent, Turn that specific layer's option to "Multiply". Then, when you color on that new layer, the coloring will go through the lineart, so that you don't have to work around it. Clear?
um, just a side note, you don't need to do the whole multiply stuff to make a layer transparent, it's already transparent by default. Provided you use the eraser tool and not a white brush to erase, it'll be transparent (even the lowest layer is transparent).
drawn in 21 min
With Lascaux, making a layer for coloring is simple. You press the little button that looks like a white square on the layer menu to your left. And then, to make the layer transparent, Turn that specific layer's option to "Multiply". Then, when you color on that new layer, the coloring will go through the lineart, so that you don't have to work around it. Clear?