I have a string template file (.st) in IntelliJ that I would like to see syntax highlighting on. How can I turn this on? I can't seem to find it anywhere.
Short answer is - you can't.
Someone must first implement a syntax highlighter plugin for the format. The StringTemplate author, Terrence Parr, has begun work on such a plugin for String Template 4 but it does not support the older .st file format. I tried the plugin. Even on .stg files it is not ideal if you use a dark editor theme.