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Reducing the size of PDF files

You can compress bitmap images, text, and line art to reduce the size of a PDF file. Options for bitmap image compression include JPEG, LZW, and ZIP. Bitmap images that use JPEG compression have a quality scale ranging from 2 (high quality, less compression) to 255 (lower quality, more compression). The higher the image quality, the larger the file size.

You can also reduce the size of a PDF file by downsampling color, grayscale, or monochrome bitmap images.

To set the bitmap compression in a PDF file Back to Top

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The JP2 (JPEG 2000) option is available only for Adobe Acrobat 6.0, Adobe Acrobat 8.0, and Adobe Acrobat 9.0

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If you choose JPEG compression, you can specify the compression quality by moving the JPEG quality slider.

To compress text and line art in a PDF file Back to Top
To downsample bitmap images in a PDF file Back to Top

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Downsampling color, grayscale, or monochrome bitmap images is effective only when the resolution of the bitmap image is higher than the resolution specified in the Bitmap downsampling area.

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