Its auto reduce file size is the best I’ve found, and I have tried many over the years. I have used PDF Expert by Readdle for reducing hi-res PDFs to a reasonable size for around 4 years now. This setting is not just good enough for retaining any detail. The default option to “Constrain Size” is set to a max of 512 pixels, which explains why you are getting poor quality PDFs when reducing the file size in Preview. Expand the filter by clicking the arrows on the left, so that you can see the details. Go to the Filters tab and find the Reduce File Size option in the filters listģ. From “Applications > Utilities,” open the ColorSync UtilityĢ. By doing this, you’ll give yourself more filter options for the Preview export:ġ. You can inspect it and copy it and adjust the settings to create additional filter options. It is here that this Reduce File Size filter option is specified.
This is where the Mac standard ColorSync Utility can help you out. The problem here is that this standard option does not give you control over how much to lower the quality in order to reduce the file size, and this standard option will leave you with a very small file of very poor image quality.
