I’ve been asked to provide links to the videos tutorials that are free from my Learn Acrobat XI training series on Udemy.com so here they are:
Print & Prepress
How to determine the dpi of a PDF file
This question comes up with some regularity on AcrobatUsers.com.
I am in a print for pay environment and i am needing to know if acrobat 11 pro can be used to see what the dpi of a file is. Or does the file have to be opened in in design or illustrator to find that out. I am the production manager in a digital print center.
Technically it not possible to do this for an entire PDF file, because only the raster images within a PDF have a specific dpi or resolution. But, if you have the Pro. version of Acrobat there are some quick and easy ways you can check the dpi for individual images or all images within a PDF file.