Position sensors for system with overlapped displays

A tablet computer that is configured to be controlled by a laptop computer, wherein the laptop computer has a processor configured to produce first content, a laptop display configured to display the first content, and a trackpad that receives trackpad input, the tablet computer comprising:

• a housing;
• a display mounted in the housing, wherein the display is configured to display second content and a cursor;
• a touch sensor that gathers touch input on the display;
• and
• control circuitry configured to operate the tablet computer in a linked mode with the laptop computer in which the trackpad input is used to control the cursor on the display to drag-and-drop the second content to the laptop display, wherein the second content is dragged-and-dropped from the display to the laptop display in response to the trackpad input.

A laptop computer that is configured to control a tablet computer having a touch-sensitive display, the laptop computer comprising:

• first and second housing portions coupled by a hinge;
• a touch-insensitive display in the first housing portion and configured to display an image;
• a trackpad in the second housing portion that receives trackpad input;
• and
• a processor configured to generate the image and to operate the laptop computer in a linked mode with the tablet computer in which the trackpad input is used to control a cursor that moves across the touch-insensitive display and the touch-sensitive display, wherein the cursor moves from the touch-insensitive display to the touch-sensitive display in response to the trackpad input.