The system for entering articles is a third party tool that I have incorporated into ATP, and it is missing many important features, including an automatic spell checking feature and a convenient copy/paste.
Worse still, it disables the native spell checking of your browser.
I have, and still am, contemplating moving our features that use this tool (currently blogs and articles) feature away from this toolbar tool and over to a more simple BB Code based textarea like we use in the forums. But making that work to produce the kinds of quality layouts that we are accustomed to is the big challenge that I've been working to overcome.