You are now ready to create your awesome extension. Using this CodeEditor, you'll be able to change options such as Theme and Font-Size. Change it to your preference. You'll also notice icons for allowing such options as Save, Undo, Redo, Find, Replace, Line-Wrapping and Full-Screen (great for mobile-use). Once you are ready to create .aix, just click on BUILD button. You will be then presented with a dialog button like below: