Page 18 - CC2017_PS_Look_Inside

6. Check the Resample option at the bottom of the dialog box (if necessary).
The options in this dialog box remember the last-used choices. The Resample option Note:
might already be checked in your dialog box.
When the Resample
Resampling means maintaining the existing resolution in the new image dimensions; option is checked, you
in other words, you are either adding or deleting pixels to the existing image. When this
option is turned on, you can change the dimensions of an image without affecting the can use the attached
resolution, or you can change the resolution of an image (useful for removing excess menu to tell Photoshop
resolution or downsampling) without affecting the image size. how to generate extra
pixel data when
7. Change the Resolution field to 300 pixels/inch. increasing the image size,
or which pixels to discard
When you change the resolution with resampling turned on, you do not change the file’s when reducing the image
physical size. To achieve 300-ppi resolution at the new size, Photoshop needs to add a
huge number of pixels to the image. You can see at the top of the dialog box that this size. Each option also
change would increase the total number of pixels from 2700 1 3600 to 11250 1 15000. includes a parenthetical
notation about when it
You can also see that changing the resolution of an image without affecting its physical is best used (enlargement,
dimensions would have a significant impact on the file size. Changing the resolution to smooth gradients, etc.).
300 ppi at the current size would increase the file size to nearly 483 megabytes.

When Resample is
checked, changing the
Resolution value adds
or removes pixels.

Higher resolution means larger file sizes, which translates to longer processing time
for printing or longer download time over the Internet. When you scale an image to
a smaller size, simply resizing can produce files with far greater effective resolution
than you need. Resampling allows you to reduce physical size without increasing the
resolution, resulting in a smaller file size.

The caveat is that once you discard (delete) pixels, they are gone. If you later try to re-
enlarge the smaller image, you will not achieve the same quality as the original (before
it was reduced). You should save reduced images as copies instead of overwriting the
originals.

8. Press Option/Alt and click the Reset button to restore the original image
dimensions in the dialog box.
In many Photoshop dialog boxes, pressing the Option/Alt key changes the Cancel
button to Reset. You can click the Reset button to restore the original values that existed
when you opened the dialog box.

Pressing Option/Alt
changes the Cancel
button to Reset.

28 Project 1: Composite Movie Ad