Add the option for assessing the editor mode

[emalcharly6373-dotcom]

There is no option for accessing the editor mod for the app that can assess when learning a program
I am currently doing the responsive web design in there when there is a example code but we can't see the output of the example code that is given
It will much more convenient that if there will be a button to access the editor mode to see the output of the example code

Request to kindly look in to it