XnView Software

• Tools » Options...
  • General » File Operations
    • [ ] Keep date/time for saving
    Browser » Misc. » Rotation
    • [ ] Keep original date/time attributes

1. Download dc0a73e8e6.jpg (as provided by Karl02) to a temporary folder near you.
2. Start XnView and navigate to that folder.
3. Go to Tools » Options...:
   • [ ] Keep date/time for saving (General » File Operations)
     [ ] Keep original date/time attributes (Browser » Misc. » Rotation)
     [x] Use Embedded thumbnail (Browser » Thumbnails » Appearance)
4. Select the thumbnail of dc0a73e8e6.jpg and go to Tools » JPEG Lossless transformations » Flip Vertical:
   • The image and its embedded EXIF thumbnail are updated, but the date/time stamp stays the same.
5. Open dc0a73e8e6.jpg and go to Edit » Set Selection size » 8x6.
6. Then go to Tools » JPEG Lossless transformations » Crop.
7. Back in Browser mode, you'll notice that the date/time stamp has been updated, but not the embedded EXIF thumbnail.
8. Select the thumbnail and go to Edit » Metadata » Recreate EXIF thumbnail.
   • If you try to open dc0a73e8e6.jpg again, you'll notice that it is kaput.

XnTriq wrote:

1. Download dc0a73e8e6.jpg (as provided by Karl02) to a temporary folder near you.

xnview wrote:The link doesn't work

• Browser mode: Tools » JPEG Lossless transformations
  • Rotate 90° left
    Rotate 90° right
    Rotate 180°
    Rotate based on EXIF value
    Flip Vertical
    Flip Horizontal
  View mode: Tools » JPEG Lossless transformations
  • Rotate 90° left
    Rotate 90° right
    Rotate 180°
    Rotate based on EXIF value
    Flip Vertical
    Flip Horizontal
    Crop

• User settings are respected = Date/time stamp is updated
  User settings are not respected = Date/time stamp is not updated