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.
Using symbols in a drawing can help you reduce the file size of the PDF file when publishing to PDF. For more information about using symbols, see “Working with symbols.”
To set the bitmap compression in a PDF file |  |
Publish to PDF.
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If you choose JPEG compression, you can specify the compression quality by moving the Quality factor slider.
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To compress text and line art in a PDF file | |
To downsample bitmap images in a PDF file | |
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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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