Reduce PDF file size

To set the bitmap compression in a PDF file
To compress text and line art in a PDF file
To downsample bitmap images in a PDF file
To exclude objects that are outside the drawing page from a PDF file

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 100% (high quality, less compression) to 1% (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.

Another way to reduce the file size of a PDF file is by excluding objects that don’t reside on the drawing page. Most PDF viewers don’t show such objects but information about them is stored in the PDF file, increasing its file size.

To set the bitmap compression in a PDF file

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1 Click File Publish to PDF.
2 Locate the folder in which you want to save the file.
3 Type a filename in the File name box.
4 Click Settings.
The PDF settings dialog box appears.
5 Click the Objects tab.
6 Choose one of the following from the Compression type list box:
• None
• LZW
• JPEG
• ZIP
• JP2
7 Click OK.
8 Click Save.

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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

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1 Click File Publish to PDF.
2 Locate the folder in which you want to save the file.
3 Type a filename in the File name box.
4 Click Settings.
The PDF settings dialog box appears.
5 Click the Objects tab.
6 Enable the Compress text and line art check box.
7 Click OK.
8 Click Save.

To downsample bitmap images in a PDF file

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1 Click File Publish to PDF.
2 Locate the folder in which you want to save the file.
3 Type a filename in the File name box.
4 Click Settings.
The PDF settings dialog box appears.
5 Click the Objects tab.
6 Enable any of the following check boxes, and type a value in the corresponding box:
• Color
• Grayscale
• Monochrome
7 Click OK.
8 Click Save.

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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 Downsampling area.

To exclude objects that are outside the drawing page from a PDF file

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1 Click File Publish to PDF.
2 Locate the folder in which you want to save the file.
3 Type a filename in the File name box.
4 Click Settings.
The PDF settings dialog box appears.
5 Click the General tab.
6 Enable the Export only objects on page check box.
7 Click OK.
8 Click Save.

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All objects that reside only partially on the page, except text and mesh fill objects, will be cropped to remove areas that are outside the page.

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