Changing resolution and image size doesn't change result on screen?

I'm using Photoshop CS3. I am trying to change the resolution of several images that will be printed in a newspaper. So the current images are 72 ppi and really huge -- for example 36 x 27 inches (document size), and when I change them to 300 ppi, the image sizes shrink to about 8 x 6 inches, as I expect. But the image I see on the screen doesn't change. So, for example, when I open up the image originally, it's at 33% and the entire image is visible. After I change the resolution, and the image size has changed accordingly, the image still appears the same and it remains at 33%. Shouldn't the image shrink on the screen since its size has shrunk? Or if it remains the same on the screen, shouldn't the percentage shift? I mean if the document size is now 8 x 6, it should be able to be displayed at 100% and not fill my whole screen... I'm so confused. Thanks...

gradded,
The "Document Size" area of the Image Size dialog is just to indicate the size (in inches) that your document will be printed. The ppi adjustment has nothing to do with what is displayed on your monitor. Your monitor doesn't care anything about ppi. The monitor contains a certain number of pixels and after you change that ppi setting, the monitor will still have that same number of pixels.
As long as you leave the "Resample Image" box unchecked, your image size (Pixel Dimensions) will not change. You will see no change on your monitor. If you check the "Resample Image" box, then your image size (in pixels) will change.
Hope this helps.

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Changing Resolution and Document size

Hello - I have a jpeg from a digital camera that I Saved As photo.psd with an original Document Size of 44" x 66" @ 72 ppi resolution.
I am using CS3 and I want to prepare the photo for printing while maintaining the highest quality possible. The first thing I did was uncheck Resample Image. Then I changed the resolution to 300. This gave me a Document Size of 10.56 x 15.84.
I want to enlarge the Document Size to 16" x 24" (the same proportions). So, it seems to me that the next step is to now check Resample Image and put in my new Document Size of 16" x 24". I would then apply some Unsharp Mask as desired.
So, should Ifollow the steps above or do you recommend a different workflow?
I've read that Photoshop will upres very well up to 200% and all I need is 166%, so it should work ok. Also, do you recommend standard Bicubic or Bicubic Smoother?
TIA

What you're suggesting will work, though you don't really need to do it in multiple steps. One step, with resampling checked, once you set all the fields as you want, will do the trick.
And for all the hype and mystery surrounding the two alternate choices for resampling, in all my work for minor resampling I always find I prefer Photoshop's original Bicubic method. For extreme upsampling I prefer, personally, a plug-in called Genuine Fractals.
Also, modern print drivers are getting very good at size matching... If the image quality in your file is to your liking, you COULD just set the print size in inches (without resampling) and be done with it. This would yield an image at a resolution lower than 300 pixels/inch, but would save you some work, and it may very well be that you will not be able to see any difference by letting the driver do the resampling as needed.
-Noel

Very confused about ppi, resolution, and image size...

I have read so much on these things and even posted along these lines here and there, but remain totally confused.
Say the size of my pictures is around 2000 x 3000. Once I download them to PSE, the resolution is 72ppi. Is this default and could I/should I change this?
I generally do four things with my pictures.
First I edit them.
Next I email to family members.
Then I order prints (99% are 5x7 or smaller)
Finally I store them (on computer with CD backup).
Now, space is a bigger concern than quality since I print small prints generally. So what would be my best options for saving my files, but getting very nice prints?
Right now, once I edit, I save my files in .jpg, baseline "optimized" at 72ppi. Only following the computer defaults though, not because I think this is best. Would I be better off saving in TIFF or is this not necessary?
Any links with further info would be appreciated also.
Thank you,
Amy

Amy,
1. I just took a picture today, and when I look in Image>resize>image size the dimensions are as follows:
W=2288px H=1712px W=31.778" H=23.778" @72px/in. resolution
When I change resolution to 325 px/in., W=7.04" H=5.268"
As the resolution is increased, the dimensions decrease. This is what is called an inverse relation.
Why did I change to 325px/in? Because for printing it is desirable to have a resolution of 240-300 px/in, or so. Also, note that this resolution gives me almost a perfect 5x7 size format, and one can crop off the excess readily. If one desires 4x6 size, one can crop to that dimension.
2. I enhance the pictures next, leaving sharpening for the last step
3. I save primarily in PSD and/or JPEG. Both PSD and TIFF allow one to retain layers, are lossless, and thus one avoids degradation with sequential editing. JPEG is is a compression format which conserves disk space (in comparison to PSD and TIFF), and is most likely required for your e-mail and your photo finisher. I save some of the JPEG files. I usually elect baseline optimized, and the JPEG allows me to elect quality 8, which is good for my purpose and results in a manageable file size.
4. Right after I download my picture files from the camera, I burn them to a CD (i.e. before I do anything else), and right after I finish the final edits I burn them to CD as well. This is my "film", if you will. If the computer fails or if I should accidentally delete a file from disk, I still have it available.
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What is the color space of the photos in photoshop?
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Regards.

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Changing resolution and image size doesn't change result on screen?

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