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Portable Network Graphic  |  1990-12-15  |  6KB  |  640x480  |  4-bit (5 colors)
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OCR: GIF89a Features Graphics Control Extensions Graphics control extensions are used to specify whether the graphic image (bit mapped or plain text) is to be overlaid in transparent or non trans- parent fashion, whether to wait for user input or delay for a period of time before continuing, and whether the image area is to be restored before continuing (to either what was there before or to the background color). We use transparency now for shadowing ...