title: adding a rectangle to .tif file
body: <p>Suppose you have .tif file which has 14 pages (multi image tif). I'd like to draw a rectangle on a specific place on a specific page. However, below example does not paste my img which I drew with ImageDraw anywhere on the second page. Where am I failing this?</p>
  <pre><code>from PIL import Image, ImageDraw
  
  im = Image.open('tiffile.tif')
  
  for i, page in enumerate(ImageSequence.Iterator(im)):
      if i == 1:
          height = width = 800
          img = Image.new('RGB', (height, width), (255, 0, 0))
          draw = ImageDraw.Draw(img)
          page.paste(img, (0,0))
          
  
  im.save('tiffile_b.tif', save_all=True)
  </code></pre>