Luckily, "plotting" from KiCAD works which makes it generate a PostScript file for each layer.
However, I need the "Edge Cuts" layer and the bottom copper layer printed on a single page. The reason is that I'm printing my layouts on transparent film, and I'm using alignment marks on the edge cuts layer to help me tape two prints on top of each other. This increases the opaqueness of my print to a point where it's usable for me.
So here's the steps it takes to get my PCB layout to a decent print:
- "Plot" the required layers from Pcbnew, leaving a bunch of PostScript files on disk.
- Convert the PostScript files to PDF:
$ for ps in *.ps ; do ps2pdf $ps ; done
- Use pdftk to generate a single PDF from the relevant layers like this:
$ pdftk layout-B_Cu.pdf background layout-Edge_Cuts.pdf output layout.pdf
Update: There's an option to include the "Edge Cuts" layer when plotting. Simply uncheck the "Exclude PCB edge layer from other layers" option as highlighted in the screenshot below.