App.screen.init{width=120, height=60}

  App.screen.init{width=800, height=600}

  assert(State.lines[loc1.line].mode == 'text')

function Text.final_text_loc_on_screen(State)
  if State.lines[State.screen_bottom1.line].mode == 'text' then
    return {
      line=State.screen_bottom1.line,
      pos=Text.pos_at_end_of_screen_line(State, State.screen_bottom1),
    }
  end
  local loc2 = Text.to2(State, State.screen_bottom1)
  while true do
    if State.lines[loc2.line].mode == 'text' then break end
    assert(loc2.line > 1 or loc2.screen_line > 1 and loc2.screen_pos > 1)  -- elsewhere we're making sure there's always at least one text line on screen
    loc2 = Text.previous_screen_line(State, loc2)
  end
  local result = Text.to1(State, loc2)
  result.pos = Text.pos_at_end_of_screen_line(State, result)
  return result
end

    --
    -- On lines that are drawings, pos will be nil.

    cursor1 = {line=1, pos=1},  -- position of cursor

    cursor1 = {line=1, pos=1},  -- position of cursor; must be on a text line

                       for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end

  State.selection1 = {
      line=State.screen_bottom1.line,
      pos=Text.pos_at_end_of_screen_line(State, State.screen_bottom1),
  }

  State.selection1 = Text.final_text_loc_on_screen(State)

    State.cursor1.line, State.cursor1.pos = State.screen_bottom1.line, Text.pos_at_end_of_screen_line(State, State.screen_bottom1)

    State.cursor1 = Text.final_text_loc_on_screen(State)

  edit.draw(State)