Set Editor in Source Mode by Default [Easiest Method]

Firstly, I am aware that there's already tutorials about this, and the only reason why I am posting this method I discovered recently is because I find it to be the easiest so far, so even newbies can understand it better than other methods. 

Step #1
Go to Templates & Styles > Templates > *Your theme* > Ungrouped Templates > codebuttons

Step #2
Near a bottom find autoUpdate: true, and below it add the following: startInSourceMode: true,

That's it!

Preview:

  Screenshot_1.png (Size: 32.91 KB / Downloads: 30)