How to restyle MIImage.i4 result image (email_header.png)?
I'm having trouble determining how a specific call to MIImage.i4 -- specifically, /MIImage.i4?imageId=48100 -- is resulting in the attached image, email_header.png. Ultimately I would like to restyle this image completely, but to do so requires that I find out how it is being generated in the first place.
Notably, I can't find this specific image in the Yellowfin/appserver/webapps/ROOT/images directory, which means that I can't replace it directly with a custom image. I also haven't had much success working out how the MIImage.i4 service itself works.
Would appreciate any pointers!