Low Resolution Images Detected: Warning

Message received: Images on pages 3, 7 are below 300 DPI at their placed size. (The details change to match your file.)

Alert level: Warning. You can acknowledge this warning in the proof window and continue.

Applies to: Interior and cover files.

Meaning

DPI (dots per inch) measures how much detail an image holds. Print needs about 300 DPI at the size the image appears on the page. Most web images and screenshots are only 72 to 96 DPI. An image can also fall below 300 DPI if it is enlarged too far in your layout. Vector text, shapes, and logos are not affected, only photos and other raster images.

Necessary actions

1. Check the preflight results to see which pages contain the flagged images.
2. Replace each flagged image with a higher resolution original. Enlarging a small image in Photoshop does not add detail.
3. Or make the image smaller on the page. A 1200 px wide image is 300 DPI at 4 inches wide but only 150 DPI at 8 inches wide.

4. Check the result:
   • InDesign: Open the Links panel and read the Effective PPI column.
   • Canva: Download as PDF Print, not PDF Standard.
   • Word: File → Options → Advanced → Image Size and Quality, tick Do not compress images in file, and set the resolution to 330 ppi. Then re-insert your images. [Test before publishing.]
5. Re-export and upload the new file. Preflight will check it again automatically.

Can I proceed without fixing it?

Yes. Acknowledge the warning in the proof window to continue. The flagged images may look softer in print than on screen, so we recommend fixing important images such as covers, photos, and logos first.

Still need help? Email our support team at filesupport@acutrack.com and include your Artwork number with the alert. We will be happy to take a look.