Determine a suggested resolution for an image, View the print size on-screen – Adobe Photoshop CS4 User Manual
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USING PHOTOSHOP CS4
Opening and importing images
Last updated 1/10/2010
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Under Document Size, enter new values for the height and width. If desired, choose a new unit of measurement.
Note that for Width, the Columns option uses the width and gutter sizes specified in the Units & Rulers preferences.
5
For Resolution, enter a new value. If desired, choose a new unit of measurement.
To restore the initial values displayed in the Image Size dialog box, hold down Alt (Windows) or Option (Mac OS),
and click Reset.
More Help topics
Selecting halftone screen attributes
Determine a suggested resolution for an image
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. Photoshop can determine a recommended image resolution based on the screen
frequency of your output device.
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.
1
Choose Image > Image Size.
2
Click Auto.
3
For Screen, enter the screen frequency for the output device. If necessary, choose a different unit of measurement.
Note that the screen value is used only to calculate the image resolution, not to set the screen for printing.
Note: To specify the halftone screen ruling for printing, you must use the Halftone Screens dialog box, accessible through
the Print command.
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For Quality, select an option:
Draft
Produces a resolution that is the same as the screen frequency (no lower than 72 pixels per inch).
Good
Produces a resolution 1.5 times the screen frequency.
Best
Produces a resolution 2 times the screen frequency.
View the print size on-screen
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Do one of the following:
•
Choose View
> Print Size.
•
Select the Hand tool or Zoom tool, and click Print Size in the options bar.
The image is redisplayed in its approximate printed size, as specified in the Document Size area of the Image Size dialog
box. The size and resolution of your monitor affect the on-screen print size.