The history of the UX of the arduino editor, came from wiring, which came from processing, which came from Design By Numbers ( <a href="http:&#x2F;&#x2F;dbn.media.mit.edu&#x2F;whatisdbn.html" rel="nofollow">http:&#x2F;&#x2F;dbn.media.mit.edu&#x2F;whatisdbn.html</a> ).<p>One of the surviving ideas was that this is an editor for beginners, to the point of having a smaller window was less intimidating, that it made the code seem like a sketch, and more encouraged playful experimentation.<p>This is my short, incomplete understanding of why the window is small when you open arduino&#x2F;processing.