Style token disappears after close notepad and reopen file
I add Style token to words in file. Close the file. Token is gone when I reopen file.
That is normal. Npp is not MS Word where style information is stored in the file.
Npp is a pure text editor. The reason why for example python code is
always displayed in color is that there is a so-called lexer which scans the
file according to previously created rules and colors it accordingly.
For files that can not be assigned to a builtin lexer you can create UDLs, user defined lexers.
Whether this is useful in your case or not, I can not say from the given information.