Set the resolution (in dots per inch) for raster images for PDF files.
When you set a higher resolution, the file is more precise, but the file size is also larger.
When you create PDF files intended for plotting, select a resolution to match the output of your plotter or printer. High resolutions (over 2,400 dpi) are for viewing. For example, when you create PDF files of drawings that contain a lot of detail, such as a topographical map of a large region, use a higher resolution setting for greater detail in the PDF file. As you increase the resolution setting, raster image quality increases, the speed of printing decreases, and memory requirements increase.
Sets the resolution for raster image colors and grayscale in the PDF file in dots per inch. This setting cannot exceed the current vector resolution setting.