To determine a suggested resolution for an image:

1Choose Image > Image Size.

2Click Auto.

3For 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 with Preview command. (See “Selecting halftone screen attributes” on page 475.)

4 For Quality, select an option:

•Draft to produce a resolution the same as the screen frequency (no lower than 72 pixels per inch).

•Good to produce a resolution 1.5 times the screen frequency.

•Best to produce a resolution 2 times the screen frequency.

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 color casts from being introduced by your scanner.

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 Photoshopcompatible 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 general plug-in information, see “Using plug-in modules” on page 58.

If your scanner does not have an Adobe Photoshop-compatible scanner driver, import the scan using the TWAIN interface. (See “Importing an image using the TWAIN interface” on page 69.)

If you can’t import the scan using the TWAIN interface, use the scanner manufacturer’s software to scan your images, and save the images as TIFF, PICT, or BMP files. Then open the files in Photoshop or ImageReady.

Importing an image using the TWAIN interface

TWAIN is a cross-platform interface for acquiring images captured by certain scanners, digital cameras, and frame grabbers. The manufacturer of the TWAIN device must provide a Source Manager and TWAIN Data source for your device to work with Photoshop and ImageReady.