Oh wait, I see there's a hardware screen orientation lock switch now. (safaribooksonline.com)
The volume and screen orientation lock buttons did seem a bit flimsy, though Velocity Micro alerted us that they were not the buttons that would be present on the final shipping product. (theverge.com)
Another unique aspect of the ThinkPad K1 is the inclusion of buttons along the front for home, back, browser, and screen orientation lock functions. (goodereader.com)