Lesson creating-Why i cant insert a code

Question

Theres a option 'code' but i cant use-How to insert a code

Answer 1

First write the code just as you write other things.
Select the code text.
Press on the code option, your work done!

Answer 2

@jamie2003 : yep!

Answer 3

thanks bro!

Answer 4

does that work for all other options???