I can't change image resolution in CS5

Forum|Forum|6 years ago
May 22, 2019
4 replies
2966 views

I do this a lot of times during the day. I get my image on screen in CS5, then go to Resize. I need it to go from 300dpi (camera res) down to 72dpi for eBay. I go to image resolution, when I try to change it, it won't let me change the 300 down to 72 or any resolution for that matter. As I say I do this all the time, all of a sudden I can't change any of the values. Please help me. Nothing on this subject in the forum helps my situation.

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dCyndiG

Participant

Yep, I know what you mean. Mine just stopped working too and I have the latest subscription version. I am very frustrated.

Abambo

Community Expert

The web is all about pixels. Get the correct pixel size, hit resample, and you are well off. You may also use the “export for web”. In some versions it may be called ”legacy” too, but it is great for exporting a picture to web use.

The PPI value is not used in web applications. It’s an indication for print application and it is mostly misunderstood in it’s interpretation. It only tells you at what pixel density a given file is printed. For standard print process you need 300ppi, for screen you need maximum one pixel in the picture is one pixel on screen. Mac screens had 72 dpi and therefore that value is still relevant. But it’s a no-sense indicator for web applications.

ABAMBO | Hard- and Software Engineer | Photographer

JJMack

Community Expert

Use menu Image>Image Size. Uncheck Resample and change Print DPI to any value you want. The image quality will remain the same not a pixel will be changed. Print DPI is just the size your image's pixels will be printed. Resolution is meaningless when is come to display devices. Displays can not change the size they display pixels. To change the size your image displays on a display you need to resample you image. That is create a new image that has fewer or more pixels. A different size Image. Why do you want to set a 72DPI print resolution. That is a large print pixel size the print will be large but not very sharp so the print should be viewed from some distance.

You actually want to resample your large image down in size reduce the number of pixels you have for the image so it will fit on a display. Resolution is meaningless on a display. They have one resolution the one they are manufactured with. All displays do not have the same ppi resolution so you image will display a different size on different resolution displays.

So in the Image>Image Size dialog check resample and set the number of pixels you want the image to have for displays. Photoshop will set the other size pixels to constrain the resize to the same aspect ratio so the image will not distort. Do noe save over the originale imge file. The new resize image has a lower image quality.

JJMack