Toggle full screen

Whenever you need to expand the editor editable region in order to manipulate content more efficiently, click the Toggle Full Screen button from the toolbar:

 

It will enlarge the editor editable region and make it as big as your screen:

 

 

Notice that the new enlarged page is opened on top of the browser window you were working in. After closing the large window (the X button in the top-right corner), you will return to the initial browser window, with the smaller the editor editable region.