I was looking at Microsoft Word to see whether there were any obvious features that made sense for .NETpad. The first idea I had was to add a zoom slider like that found in the bottom right of the Word application window. But because the Windows Forms StatusStrip control only supports labels, progress bars, drop-down buttons, and split buttons---and not any kind of slider control---that wouldn’t work.
And then I saw word count, which appears as a label in Word’s status bar. Word count would be very useful in a text editor. And it seemed like the type of thing that would be fairly easy to implement.