Hello,
The Newline Characters field is different from the Current Encoding field.
As for the Current Encoding field, you can double-click on it to reload the current file with a different encoding. However, you cannot reload the current file with a different newline character. Until you save the file, there will be inconsistency between the actual newline character and the displayed newline character. That’s why the Newline Character field is not double-clickable.