Unlike vector graphics, rasterized content has a static pixel content with a set resolution, meaning that it is not dynamically drawn but instead is just presented when embedded in a PDF file. The second type of graphic is a "rasterized" or grid-based graphic that has a set pixel resolution.
#How to make preview default on mac for jpeg how to
The first is vector-based graphics, which are resolution-independent, and therefore can tell Preview or other PDF readers through coded directions how to draw image content so it will appear nicely on screen regardless of the zoom level. There are basically two types of graphics that PDF files will handle.
The resulting document generally is very large in size, and often is too large to email to someone - especially if it is a multi-page document. I usually use Preview to make PDFs on my MacBook by scanning documents in and selecting "save as PDF" and the directory where I wish it to be stored. Unfortunately, even when scanning relatively simple text documents, some people may run into problems in which the imported file ends up being exceptionally large, as MacFixIt reader "Emmy Zuckerman" describes:
We recently covered how to use Preview for editing and organizing multipage PDFs, but in addition it can be used to import images from various sources, including locally attached or shared scanners that use Apple's Bonjour print services. Apple's Preview application initially was just a quick viewer for displaying image and PDF files in OS X, but over the years it has acquired a number of features that have turned it into a useful utility, especially since it is much simpler than tools like Photoshop and iPhoto while offering similar basic manipulation options.
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