While PrimoPDF makes it easy to prepare PDFs for the most common usage scenarios with the Screen, Print, eBook, and Prepress output options, it also enables you to fine-tune image settings using Downsampling.
Downsampling enables you to reduce image resolution, discarding pixel information and resulting in a smaller PDF. Simply choose Custom from the PDF output options in the PrimoPDF window to customize settings for Color, Grayscale, and Monochrome images. Once you select an image type, you can adjust the following settings:
- Don’t downsample. Produces the highest quality of output, best for creating PDF files for printing to a commercial quality printer.
- Average. Produces good quality results suitable for printing to most desktop printers.
- Subsample. Results in smaller file sizes and faster PDF creation, but may decrease visual quality.
- Bicubic. Creates higher visual quality than other subsampling methods, but may take longer to generate.
You will also need to specify a downsample threshold, which establishes the resolution threshold in PPI (pixels per inch) for downsampling and the target resolution. Any images having a resolution above the first value specified will be downsampled to the second resolution specified. Now you can prepare your PDF images for any situation!
