Embodiments are described for handling situations when a window or application is repositioned and clipped in a multi-screen device. In embodiments, if the window is repositioned such that it cannot be displayed entirely on one display, but would otherwise spillover or spill onto another display, the window or application is clipped. Such clipping is performed based on the size and location of the window and the size and location of the display.

A work position guide apparatus for guiding an autonomous yard tractor to a work position, includes a reference position determination unit that determines a reference position based on a position of a crane located at a work position, a real-time position detection unit that detects a real-time position of the autonomous yard tractor, an error data acquisition unit that acquires error data between the reference position and the real-time position, and a guide command generation unit that generates a guide command for guiding the autonomous yard tractor to the work position based on the error data.