RS> It sounds like Mystic is not actually rendering your ANSI as you entered
 RS> it, i.e. your clear-screen sequence isn't actually clearing the user's
 RS> screen. 

Mystic renders ANSI in message content in the context of the message viewport. In other words, Mystic knows that a clear screen in an uploaded ANSI message should clear only the message viewport not the entire user's terminal, and it acts accordingly.

The same holds true for all ANSI commands, cursor movements, clear screen/lines, etc.  They are rendered in the context of the message viewport, not the entire user's terminal.

You can mix and match ANSI and text inline with the message editor that has TheDraw-like features, and Mystic will save and render it WYSIWYG in your message bases. This was something I originally did in the early 2000s so that people could co-create ANSI art within actual message bases and then download the completed ANSIs...

But these days its mostly just a factor when people post ANSI BBS ads lol

Mystic applies a similar methodology to ANSI file descriptions too when using things like FILE_ID.ANS.

Anyway, thats why a clear screen in a traditional BBS will clear the entire screen but Mystic it only clears the "message viewport".

Hope that helps clear things up.

--- Mystic BBS v1.12 A48 2022/03/26 (Windows/64)