Optimizing PDFs with Adobe Acrobat 8

When it comes to optimizing PDFs, there are several steps you can take to reduce their file size and improve performance. In this article, we'll explore some of the key techniques for optimizing PDFs using Adobe Acrobat 8.

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One of the first things to consider when optimizing a PDF is the type of images used in the document. Choose JPEG compression for smooth-toned color images and ZIP for flat-color images that would normally be compressed as a GIF or PNG. For web use, you only need 72 dpi for color images, and 150 dpi is a good compromise for monochrome images.

The Image Settings panel also allows you to downsample images to lower image resolution, which can further reduce the file size of your PDF.

In Acrobat 8 Professional, you can access the PDF Optimizer by choosing Advanced -> PDF Optimizer. Clicking on the Audit Space Usage button (see Figure 4) will give you an idea of how much space each component of your PDF is taking up.

According to our test results, fonts take up the most space in a typical PDF, followed by content streams (text) and document overhead. By concentrating your efforts on these areas, you can make significant reductions in file size.

The Audit Space Usage dialog shows which components of your PDF are taking up the most space, in bytes for each element and the percentage of total file size (see Figure 5). From here, you can strip, flatten, downsample resolutions, and remove features from your PDF to minimize its file size.

Acrobat 8's PDF Optimizer is an improved version of Acrobat 7's PDF Optimizer, which was previously known as Distiller. By using these tools, you can significantly reduce the file size of your PDFs and improve their performance.

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