'link (___) (to second cursor)',

  elseif cmd == 'link' then
    command.link(args)

function command.link(rel)
  if Grab_pane == nil then
    print('link: needs something to be in the secondary "grab" cursor but found nothing')
    return
  end
  if rel == nil then
    rel = 'next'
  end
  if Cursor_pane.col < 1 then
    print('no current note')
    return
  end
  local pane = Surface[Cursor_pane.col][Cursor_pane.row]
  if pane == nil then
    print('no current note')
    return
  end
  if Cache[pane.id].links[rel] then
    print(('%s already has a %s note'):format(pane.id, rel))
    return
  end
  print('connecting up links')
  Cache[pane.id].links[rel] = Grab_pane.id
  Cache[Grab_pane.id].links[Opposite[rel]] = pane.id
  refresh_pane_height(pane)  -- just in case this is the first link
  refresh_pane_height(Grab_pane)  -- just in case this is the first link
  Grab_pane = nil
  plan_draw()
end