Codechef IDE features

Apart from those obvious, what lesser known tools does codechef ide have?
Specifically I wanted to know if it is possible to highlight a line or block of code. Other, more general tips are welcome too.

What will you do with highlighting a line or block of code in your IDE?

Right now it is possible when you add explanations to your submitted code. You can go to any of your past AC submission and click on Explain my code, there you will get option to highlight and explain the code.