Compression eliminates redundant or unwanted pixel information, while downsampling reduces the resolution of images to save space. The key processes involved in optimizing them are compression and downsampling. Images often contribute a significant amount to file size. Note that changing any settings will reset the current profile to Custom, but you can then save any custom settings to a new profile, so that isn’t really a problem. If not, then it’s easy enough to tweak them. If one of the built-in profiles seems to suit your needs, then great! Use it. Mobile, on the other hand, represents a more aggressive approach to optimization, and is designed to ensure smaller file sizes that can be downloaded and viewed on devices that typically operate with more limited bandwidth. As a result, it is compatible with older viewing software, and isn’t too drastic in the way it shrinks images and removes other elements. Essentially, Standard is designed for broad compatibility with a broad range of viewing environments. By default, Acrobat XI only ships with two: Standard and Mobile. First up, check the settings for various in-built profiles. You have rather a lot of options when customizing the PDF Optimizer to your particular needs. Clicking on the panel name on the left-hand side brings up the panel and its specific options. The types of content to be optimized can be toggled individually using the check boxes next to the panels on the left-hand side of the PDF Optimizer interface. Since Acrobat/PDF Optimizer breaks them down by them into separate panels, we’ll do the same here. The PDF Optimizer presents a lot of options. By Dan Shea, Planet PDF Contributing Editor.
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