return function (class)
   class.options.papersize = "74mm x 105mm"

   if class._name == "cabook" then
      class.defaultFrameset = {
         content = {
            left = "left(page) + 12mm",
            right = "right(page) - 6mm",
            top = "top(page) + 8mm",
            bottom = "bottom(page) - 6mm",
         },
      }

      class:registerPostinit(function (_)
         SILE.setCommandDefaults("imprint:font", { size = "7pt" })
      end)
   end
end
