The latest Chrome OS Dev release contains an experimental feature called “Display Size” in the Settings panel that will allow Chromebook owners to quickly adjust the size of the display when their computers are connected to an external display while preserving a sharp and clear image. From the screenshot attached, it looks to us like it’s some sort of HiDPI setting that magnifies Chromebook’s original screen resolution to fit the external display if it has a bigger resolution, which might come in handy when you do presentations or similar activities with your Chromebook.