function geom.on_any_shape(x,y, drawing)
  for _,shape in ipairs(drawing.shapes) do
    assert(shape)
    if geom.on_shape(x,y, drawing, shape) then
      return true
    end
  end
  return false
end

Show_nearby = false

  if Show_nearby then
    love.graphics.setColor(1,0.75,0.75)
    for y=0,127 do
      for x=0,255 do
        if geom.on_any_shape(x,y, line) then
          love.graphics.circle('fill', Drawing.pixels(x)+Margin_left, Drawing.pixels(y)+line.y, 2)
        end
      end
    end
  end

  if chord == 'C-a' then
    Show_nearby = not Show_nearby
    return
  end

* There's a bug in freehand drawings (`ctrl+p` mode) that causes them to be
  highlighted even when the mouse is nowhere near them.