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Reducing Adobe PDF file size
Reducing the size of Adobe PDF files improves their performance--particularly when
they're being accessed on the web--without altering their appearance. You can sometimes
reduce the file size of an Adobe PDF file simply by using the Save As command. This
resaves the file and does not require access to the source file used to generate the Adobe
PDF file.
If you receive a large PDF document, you can use the Reduce File Size command to try to
reduce the file size by resampling and recompressing images, unembedding fonts,
compressing document structure, and cleaning up elements such as duplicate background
images and invalid bookmarks. If the file size is already as small as possible, this
command has no effect. (See
Using PDF Optimizer .)
Note: Reducing the file size of a digitally-signed document invalidates the signature.
You can also reduce file size by limiting the compatibility with earlier versions of Adobe
Acrobat. This is recommended only if you are sure that all your users use Acrobat 7.0,
Acrobat 3D, or Adobe Reader 7.0.
Note: You can also set version compatibility in PDF Optimizer.
To reduce file size:
1. Choose File > Reduce File Size.
2. Select the version compatibility that you need, and click OK.
Note: If you select Acrobat 4.0 And Later, and the document contains transparency, the
transparency is flattened.