How can you change a photo's image resolution and dimensions without affecting print quality?

How can you change a photo's image resolution and dimensions without affecting print quality?

• A. Use Image > Image Size; deselect Resample to change only the resolution while preserving pixel data, or re-check Resample to alter pixel dimensions; generally use 300 ppi for print.
• B. Use File > Save As to adjust resolution.
• C. Use the Crop Tool to resize the image.
• D. Change the color mode to CMYK to adjust resolution.

Answer: (A)

In Photoshop, you control print size and pixel data separately through the Image Size dialog by using the Resample option. The key idea is that resolution (pixels per inch) and physical print dimensions are tied to how many pixels you have, and you can adjust one without necessarily changing the other. If you want to change the print size or resolution without altering the pixel data, you deselect Resample. This keeps the actual pixels intact, and Photoshop adjusts the document’s physical dimensions when you change the resolution. So you can set a higher or lower ppi and see how wide and tall the image would print, without adding or removing pixels. This preserves image quality because you aren’t interpolating new data. If you need to change the actual number of pixels (for example, to print at a different size with more or fewer pixels), you would re-check Resample. That tells Photoshop to add or remove pixels to match the new settings, which can affect image quality because it involves interpolation or loss of data. For print work, a standard target is 300 ppi, which generally yields sharp results on most printers. The other options don’t achieve the same controlled change: Save As only changes file format; the Crop Tool alters the visible area but not the document’s pixel data in a controlled way for print size and resolution; changing color mode to CMYK only affects color space, not the resolution.

In Photoshop, you control print size and pixel data separately through the Image Size dialog by using the Resample option. The key idea is that resolution (pixels per inch) and physical print dimensions are tied to how many pixels you have, and you can adjust one without necessarily changing the other.

If you want to change the print size or resolution without altering the pixel data, you deselect Resample. This keeps the actual pixels intact, and Photoshop adjusts the document’s physical dimensions when you change the resolution. So you can set a higher or lower ppi and see how wide and tall the image would print, without adding or removing pixels. This preserves image quality because you aren’t interpolating new data.

If you need to change the actual number of pixels (for example, to print at a different size with more or fewer pixels), you would re-check Resample. That tells Photoshop to add or remove pixels to match the new settings, which can affect image quality because it involves interpolation or loss of data.

For print work, a standard target is 300 ppi, which generally yields sharp results on most printers. The other options don’t achieve the same controlled change: Save As only changes file format; the Crop Tool alters the visible area but not the document’s pixel data in a controlled way for print size and resolution; changing color mode to CMYK only affects color space, not the resolution.