When we click on Font Colors, Font Size or Font Style in text area of post new thread it generate code. I don't want that code generation Is there any option remove that code generation .....?
No, there isn't. I think what you want is a WYSIWYG editor (what you see is what you get), and that's not what this forum has. It has a BBCode base. The code isn't going to show up once you actually post, though, if that's what you're concerned about. Other than that, I don't know why you'd be worried about the BBCode being in the text editor.
This forum actually does have a WYSIWYG editor. If you click the first button in the row in the quick reply editor below, WYSIWYG will be turned on