We are talking about one-handed use feature of Build 10136 that makes the start screen slide down on devices with screen-sizes of more than 5-inch. Though Microsoft claims that this feature is available for devices with 5-inch display too, but our Lumia 540 doesn’t seem to have this feature after update. Apart from one-handed use feature we also demo movable keyboard and different multitasking view on Lumia 640 XL, as we haven’t done it before.