Forum posting question ... how post a thread question with color syntax highlighting ??

[james.p.leblanc]

Dear All,

I have noticed that quite a few posts and responses on this
forum include d snippets made with **nicely colored syntax 
highlighting.**
(I do not mean just the bold markdown text.)

This increases post clarity significantly.

How is this being done?  (I hope that this is not considered off
topic.  My goal would be able to make such posts myself.  But 
also,
if more post in this manner, it may help many.)

Best Regards,
James