Hi @Evgeny Shvarov, yes, I had a look at thie project earlier, but my understanding was that it only worked for pure JSON messages and not one that mix classic content with JSON. 

Wish it was so easy. Unfortunately, my challenge is different - DO NOT MODIFY incoming messages but rather create a custom message display handler class. I believe that with some tweaking of standard display handler class and using some advancexd CSS styles, it could be doable.

Hi Enrico,

no magic this time. I just consulted our online documentation, knowing only in advance that $view shows a lot of interesting things :) See this link for details - https://docs.intersystems.com/iris20251/csp/docbook/Doc.View.cls?KEY=RCO...

But, you're right, $zname can do the same.

Dan