How do I know the resolution (DPI?) of a PDF file?

[dublove]

How do I know the resolution (DPI?) of a PDF file?

Can you see it in Acrobat?

[Thom Parker]

Raster images have a dpi, but the page content of a PDF is a vector graphic, which does not have dpi.  Vector graphics can scale to any size without lose of quality, essentially an infinate dpi. 

That said, PDF page content can include raster images.  In that case, the part that is a raster image has a dpi rating, and it can be seen in Acrobat. 

[JR Boulay · Accepted solution]

To know the resolution of an image open the Print Production tools: Output Preview, Select the Object Inpector an clic on any image.

[dublove]

Thank you very much. It's a good idea.

[DEMACO]

This is very helpful, thanks!

[DEMACO]

As the author mentions, you must left click on the image with your mouse pointer to get the attributes.

[Denise37672996uidr]

I print lots of labels for my small business. Up until recently, when I got my file ready to print, I was able to select "print on both sides" and select ADVANCED settings to change the dpi from 600 to 1200.

Tonight, I was NOT able to see the "print on both sides" NOR see any advanced settings that include the dpi changes.

I have a Canon MF753CDW printer and have had no issues til now. Not sure what could be causing the issue.

I've removed and re-installed the printer. I've cleaned the printheads according to manufacturer recommendations. I have been printing labels since September in the EXACT Same manner with no issues til now.

Not sure if it's an update in Windows, Adobe, or Canon.

Any thoughts?

[Ken the Book Printer]

You can use the preflight tool to check the DPI (dots per inch) and scan all the images. However, you’ll need to set up a custom profile. Go to the preflight tool, create a new profile, set it to check images below a certain DPI, and then run the analysis.

https://kenthebookprinter.com/resource/how-to-arrange-pages-for-booklet-printing