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Graphics Interchange Format  |  1996-07-01  |  49KB  |  246x523  |  4-bit (16 colors)
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OCR: Byte 0 Logical Screen Width Byte 1 Byte 2 Logical Screen Height Byte 3 Byte 4 Byte 5 Background Color Index Byte 6 Pixel Aspect Ratio Global Color-Table Flag (one bit) Color Resolution (three bits) Sort Flag (one bit) Size of Global Color Table (three bits) Figure 1: Logical-screen-descriptor layout.