When you have finished making all your choices in PDF Optimizer, select the OK button on the bottom right. The Discard Objects panel and the Discard User Data panel let you specify objects and data to remove from the PDF.Finally, the options in the Clean Up panel remove useless items from your document. If your PDF includes artwork with transparency, you can use the presets in the Transparency panel to flatten transparency and reduce file size. That way you retain the look of your PDF without carrying the overhead of characters that are notbeing used. In general, JPEG 2000 and JPEG give better results on photographs and ZIP is the better choice for illustrations with large areas of solid, flat color.įor monochrome images, JBIG2 compression is superior to CCITT.In the Fonts panel you can save space in a PDF by unembedding the fonts but then there are no guarantees that people viewing your PDF will see it as youintended.Ī better choice is to subset all embedded fonts. The Images panel of PDF Optimizer lets you set options for color, grayscale, and monochrome image compression, and image downsampling.Downsampling reduces file size by lowering the resolution of images, whereas image compression reduces file size by eliminating unnecessary pixel data. There are six different panels in the PDF Optimizer dialog box that you can work with to reduce the size of a PDF. However, you will want to select a version that you think will include the majority of your viewers. The later the version you choose, the better the compression you will be able to achieve. I can see near the top left that my current PDF version is Acrobat 8 and then I can go over to the compatibility settings and choose from Acrobat 4 up through Acrobat X. Once you have created some custom settings, you can save them with a unique name so that you can come back at any point in the future and go directly to those settings.Next I choose the Acrobat version compatibility that I want. Or you can create your own Custom setting. The next thing to do is go to the Settings options on the upper left and choose a setting.Īcrobat X Pro comes with two preconfigured settings, Standard and Mobile. In the auditreport that comes up, I can see that in this PDF images make up 91.8 percent of the file size so that is clearly where I should spend my efforts in trying toreduce the size. The first thing you will want to do when you open up PDF Optimizer is to select the button in the upper right that says "Audit space usage". PDF Optimizer lets you customize exactly how you reduce the size of a PDF.The settings you choose will depend on how you intend to use the file.įor example, the image compression you select for a PDF that will be posted onlinewill be very different from the image compression you select for a PDF in a print production workflow. To get to PDF Optimizer, simply go to File>Save As>Optimized PDF. The newer the version you select, the greater the potential file size reduction. While you can easily reduce file sizes by simply going to File>Save As>Reduced Size PDF, the only control you have over how the reduction is accomplished isthe ability to choose Acrobat version compatibility from the dropdown list. PDF Optimizer can also help create PDF files that are more efficient to distribute in a print production workflow. PDF Optimizer provides many settings to help you reduce the size of PDF files and speed up their display or download times. You can significantly speedup your PDF files with Acrobat X Pro's PDF Optimizer. How to optimize your PDF file using Acrobat XĪs more people have access to high speed internet, their impatience with files that take a long time to open or download has grown.
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