In regards to comment 20.....
randy- you are right- PLUS it resizes the image to that especially for printing.
But what it does is keeps the pixels the same, but just resizes the image to your given pixels per inch.
For example (just to keep it simple for math sake) if you have a 720x720 pixel image at 72 pixels per inch, it would be a 10x10 inch image. Now when that box ix unchecked- and you just say enter 5" as the size, it would change the pixels per inch to 144 -OR- if you change the pixels per inch to a printable setting (let's just say 240 for math sake) you would have a 3x3 inch image. This way the "content" of each pixel is unchanged- only the size is different. If you keep tha box checked, and just say you increase the pixels per inch, all you are doing is dividing & duplicating the pixels.

**Important note about comment 22...**Cyn the box that you are referring to is the "CONSTRAIN PROPORTIONS." That is the box that allows you to change the height & width independent of one another. It is totally different from "Resample Image."