Sometimes, if the PDF wasn’t high-quality already, resizing it can make it blurry—to the point where the text and images become illegible. Reduce PDF Size on a Mac Without Losing Quality ...

On the internet, size matters. If you've ever had to send PDF files to a friend or colleague, or if you’re running a business, it's quite likely that ...

If you need a high-quality PDF for a presentation or work assignment, you may be better off using another space-saving method, like saving it to a cloud-based backup system or an external hard drive.

Some PDF viewers will show images or text blurry if the document is viewed at a smaller size than 100 percent. This can affect output especially if the PDF is going to be copied using screen capture.