To set guide and grid preferences (Photoshop): 1 Do one of the following:

•In Windows or Mac OS 9.x, choose Edit > Preferences > Guides, Grid, & Slices.

•In Mac OS X, choose Photoshop > Preferences > Guides, Grid, & Slices.

2For Color, choose a color for the guides, the grid, or both. If you choose Custom, click the color box, choose a color, and click OK. (See “Using the Color palette” on page 259.)

3For Style, choose a display option for guides or the grid, or both.

4For Gridline Every, enter a value for the grid spacing. For Subdivisions, enter a value to subdivide the grid.

If desired, change the units for this option. The Percent option creates a grid that divides the image into even sections. For example, choosing 25 for the Percent option creates an evenly divided 4-by-4 grid.

5 Click OK.

Working with Extras

Guides, grid, target paths, selection edges, slices, image maps, text bounds, text baselines, text selections, and annotations are nonprinting Extras that help you select, move, or edit images and objects. You can turn on or off an Extra or any combination of Extras without affecting the image. You can also show or hide Extras by choosing the Extras command in the View menu.

For a description of using specific Extras, see “Using guides and the grid” on page 45; “Annotating images (Photoshop)” on page 50; “Making pixel selections” on page 157; “Using the marquee tools” on page 158; “Selecting paths (Photoshop)” on page 211; “Entering paragraph type” on page 343; “Formatting characters” on page 349; “Creating and viewing slices” on page 368; and “Creating and viewing image maps (ImageReady)” on page 383.

To show Extras:

Choose View > Extras. A check mark appears next to all shown Extras in the Show submenu.

Note: Choosing Extras also shows color samplers, even though color samplers are not an option in the Show submenu.

To hide Extras:

With Extras showing, choose View > Extras. A dot (Windows) or a dash (Mac OS) appears next to all hidden Extras in the Show submenu.

Note: Hiding only suppresses the display of Extras. It does not turn off these options.

To show one Extra from a list of hidden Extras:

Choose View > Show and choose an Extra from the submenu. Choosing one of the hidden Extras will cause it to show, and turn off all other Extras.

To turn on and off a group of Extras:

Choose View > Show > All to turn on and show all available Extras. Choose View > Show > None to turn off all Extras.

Displaying status information (Photoshop)

The status bar at the bottom of the window displays useful information—such as the current magnification and file size of the active image, and brief instructions for using the active tool.

To show or hide the status bar (Windows only):

Choose Window > Status Bar. A check mark indicates the item is showing.

Displaying file and image information

Information about the current file size and other features of the image is displayed at the bottom of the application window (Windows) or document window (Mac OS).

Note: In ImageReady, if the document window is wide enough, two image information boxes appear, enabling you to view two different information options for the image at the same time. For more information about original and optimized images, see “Viewing optimized images (ImageReady)” on page 418.

You can also view copyright and authorship information that has been added to the file. This information includes standard file information and Digimarc® watermarks. Photoshop automatically scans opened images for watermarks using the Digimarc Detect Watermark plug-in. If a watermark is detected, Photoshop displays a copyright symbol in the image window’s title bar and updates the Copyright & URL section of the File Info dialog box.

To display file information in the document window (Photoshop):

1 Click the triangle in the bottom border of the application window (Windows) or document window (Mac OS).

Illustration of file information view options in Photoshop

2 Select a view option:

•Document Size to display information on the amount of data in the image.The number on the left represents the printing size of the image—approximately the size of the saved, flattened file in Adobe Photoshop format. The number on the right indicates the file’s approximate size including layers and channels.

•Document Profile to display the name of the color profile used by the image.

•Document Dimensions to display the dimensions of the image.

•Scratch Sizes to display information on the amount of RAM and scratch disk used to process the image. The number on the left represents the amount of memory that is

currently being used by the program to display all open images. The number on the right represents the total amount of RAM available for processing images.

•Efficiency to display the percentage of time actually doing an operation instead of reading or writing the scratch disk. If the value is below 100%, Photoshop is using the scratch disk and, therefore, is operating more slowly.

•Timing to display the amount of time it took to complete the last operation.

•Current Tool to view the name of the active tool.

To display image information in the document window (ImageReady):

1Click an image information box at the bottom of the document window.

2Select a view option:

•Original/Optimized File Size to view the original and optimized file size images.The first value indicates the original image file size. The second value (present if the original image has been optimized) indicates the optimized image file size and file format based on the current settings in the Optimize palette.

•Optimized Information to view the file format, file size, number of colors, and dither percentage for the optimized image.

•Image Dimensions to view the image’s pixel dimensions.

•Watermark Strength to view the strength of the Digimarc digital watermark in the optimized image, if present.

•Undo/Redo Status to view the number of undos and redos that are available for the image.

•Original in Bytes to view the size of the original, flattened image expressed in bytes.

•Optimized in Bytes to view the size of the optimized image expressed in bytes.

•Optimized Savings to view the percentage of the optimized image file size reduction, followed by the difference in bytes between the original and optimized sizes.

•Size/Download Time to view the file size for the optimized image and estimated download time using the selected modem speed.

Note: Download times may vary based on Internet traffic and modem compression schemes. The value displayed is an approximation.

To view additional file information:

Choose File > File Info.

To read a Digimarc watermark:

1Choose Filter > Digimarc > Read Watermark. If the filter finds a watermark, a dialog box displays the Creator ID, copyright year (if present), and image attributes.

2Click OK, or for more information, choose from the following:

•If you have a Web browser installed, click Web Lookup to get more information about the owner of the image. This option launches the browser and displays the Digimarc Web site, where contact details appear for the given Creator ID.

•Call the phone number listed in the Watermark Information dialog box to get information faxed back to you.