Image still blurry despite 300 ppi and high quality display performance

Question

Hi, I've been putting together a couple of large posters (24 in x 36 in) for a school project and the main image of it is super blurry for some reason, both in the InDesign file and when I export it as a png. I've ensured the display performance is set to high quality from the view menu, object menu, and my preferences. I've ensured the PPI of the main image is over 300. I've ensured the main image is over 24 inches wide. I've tried enabling and disabling antialiasing.

I've checked pretty much everything, but nothing has really fixed the problem. I haven't been able to find info in past posts on the forum, and I've never had this issue before. I was hoping someone on here could help me fix this soon.

Eugene Tyson · Accepted Answer

It's never going to look as good in InDesign - InDesign generates a proxy image to display to save on power. That image is only a representation of what you see.

I wrote an article here to help you troubleshoot

https://creativepro.com/high-res-image-look-low-res/

Derek Cross · Answer

You need to check the Effective PPI of the image in the Links Panel. If you've enlarged the image when you Placed it in InDesign, the resolution will be reduced from the original 300PPI.

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