Download Adobe Photoshop 6.0 User Guide

ADOBE PHOTOSHOP 6.0 99
User Guide
Determining a recommended resolution
for an image (Photoshop)
• Good to produce a resolution 1.5 times the
screen frequency.
If you plan to print your image using a halftone
screen, the range of suitable image resolutions
depends on the screen frequency of your output
device. You can have Photoshop determine a
recommended resolution for your image based on
your device’s screen frequency. (See “About image
size and resolution” on page 92.)
• Best to produce a resolution 2 times the
screen frequency.
Note: If your image resolution is more than
2.5 times the screen ruling, an alert message appears
when you try to print the image. This means that
the image resolution is higher than necessary for
the printer. Save a copy of the file, and then reduce
the resolution.
5 Click OK.
Scanning images
Before you scan an image, make sure that the
software necessary for your scanner has been
installed. To ensure a high-quality scan,
you should predetermine the scanning resolution
and dynamic range your image requires. These
preparatory steps can also prevent unwanted
colors casts from being introduced by your
scanner.
To determine a suggested resolution for an image:
1 Choose Image > Image Size.
2 Click Auto.
3 For Screen, enter the screen frequency for the
output device. If desired, choose a new unit of
measurement. Note that the screen value is used
only to calculate the image resolution, not to set
the screen for printing.
Important: To specify the halftone screen ruling for
printing, you must use the Halftone Screens dialog
box, accessible through the Print Options dialog box.
(See “Selecting halftone screen attributes” on
page 379.)
4 For Quality, select an option:
• Draft to produce a resolution the same
as the screen frequency (no lower than 72 pixels
per inch).
Scanner drivers are provided and supported by
the manufacturers of the scanners, not Adobe
Systems Incorporated. If you have problems with
scanning, make sure that you are using the latest
version of the appropriate scanner driver.
Importing scanned images
You can import scanned images directly from any
scanner that has an Adobe Photoshop-compatible
plug-in module or that supports the TWAIN
interface. To import the scan using a plug-in
module, choose the scanner name from the File >
Import submenu. See your scanner documentation for instructions on installing the scanner
plug-in.
For more information, see “Using plug-in
modules” in online Help.