Question / Problem:
Why is the image viewer missing in the Edit Document Window for the Extraction Set in the Transformation Designer?
Answer / Solution:
If the image viewer is missing from the Edit Document window then a registry value is corrupt.
To resolve navigate to the following registry key:
If there are any unusually high values such as WidthFieldTree = 65000 that is most likely the cause of the issue. This can be resolved by either changing the values to a reasonable value or just delete the entire registry key and it will be regenerated next time the window is opened.