A display apparatus and method and an information processing apparatus and method, by which a picture in picture (PIP) region is automatically and freely changed between a semi-transparent state and an opaque state according to a position of a pointing device, are provided. The information processing apparatus includes a communicator receiving position information of the PIP region from the display apparatus and transmitting transparency information, which changes a screen of the PIP region into the semi-transparent state or the opaque state according to whether the pointing device is positioned within the PIP region, to the display apparatus; and a PIP monitoring unit setting a state of the transparency information according to whether the pointing device is positioned within the PIP region.
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