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Figure 3-14: A look at the Save dialog box, which incorporates the old Save a Copy command as a save option.
Note that the options you can select vary depending on the image file and the selected file format. If an option is dimmed, it either doesn't apply to your image or isn't supported by the file format you chose. And if your image includes features that won't be saved if you go forward with the current dialog box settings, Photoshop gives you the heads up by displaying a warning message at the bottom of the dialog box.
As a Copy: Select this check box to save a copy of the image while leaving the original open and unchanged in other words, to do what the Save a Copy command did in Photoshop 5.5 and earlier. The result is the same as duplicating an image, saving it, and closing the duplicate all in one step.
The whole point of this option is to enable you to save a flattened version of a layered image or to dump other extraneous data, such as masks. Just select the file format you want to use and let Photoshop do the rest for you.
Annotations: Select this check box to include any annotations that you created using the notes and audio annotation tools. You can find out how to annotate your images in the section "Adding Annotations," later in this chapter.
Alpha Channels: If your image contains an alpha channel Photoshop's techy name for an extra channel, such as a mask (discussed in Chapter 9) select the Alpha check box to retain the channel. Only a few formats notably Photoshop, PDF, PICT, PICT Resource, TIFF, and DCS 2.0 support extra channels.
Spot Colors: Did you create an image that incorporates spot colors? If so, select this option to retain the spot-color channels in the saved image file. You must save the file in the native Photoshop, PDF, TIFF, or DCS 2.0 format to use this option.
Layers: TIFF and PDF can retain independent image layers, as can the native Photoshop format. Select the check box to retain layers; deselect it to flatten the image. Caution If you're working with a layered image and select a file format that doesn't support layers, a cautionary message appears at the bottom of the dialog box. However, Photoshop doesn't prevent you from going through with the save, so be careful. All layers are automatically merged when you save the file in a
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nonlayer format. However, when you close the file, Photoshop reminds you that you haven't saved a version of the image that retains all data and gives you the opportunity to do so.
Use Proof Setup: This option relates to Photoshop's color profile options. If the current view's proof setup is a "convert to" proof, Photoshop converts the image to the selected proofing space when saving.
ICC Profile (Win)/Embed Color Profile (Mac): If you're saving your image in a file format that supports embedded ICC profiles, selecting this option embeds the profile. The current profile appears next to the option name. See Chapter 16 for advice about working with color profiles.
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6.3.3 File Format Roundup
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File Format Roundup
Photoshop CS supports more than 25 file formats from inside its Open and Save dialog boxes. It can support even more through the addition of plug-in modules, which attach commands to the File ® Save As, File ® Import, and File ® Export submenus.
File formats represent different ways to save a file to disk. Some formats provide unique image-compression schemes, which save an image in a manner that consumes less space on disk. Other formats enable Photoshop to trade images with different applications running under Windows, the Mac, or some other platform. The native format
Like most programs, Photoshop offers its own native format that is, a format optimized for Photoshop's particular capabilities and functions. This .psd format saves every attribute that you can apply in Photoshop including layers, extra channels, file info, and so on and is compatible with Versions 3 and later of the program. Of course, when you open files in earlier versions of Photoshop, you lose file attributes related to later versions, such as annotations, color proof options, and so on.Note
Photoshop isn't the only application that uses .psd as its native format; .psd is also the native format used by Photoshop's close relatives ImageReady and Photoshop Elements. Tip Perhaps not surprisingly, Photoshop can open and save more quickly in its native format than in any other format. The native format also offers image compression. Like TIFF's LZW compression, the Photoshop compression scheme does not result in any loss of data. But Photoshop can compress and decompress its native format much more quickly than it can TIFF, and the compression scheme is better able to minimize the size of mask channels (as explained in Chapter 9).
The downside of the Photoshop format is that relatively few applications other than Photoshop support it, and those that do don't always do a great job. Some applications, such as Corel Photo-Paint and Adobe After Effects, can open a layered Photoshop image and interpret each layer independently. But most of the others limit their support to flat Photoshop files. To accommodate these programs, you can either deselect the Layers check box in the Save dialog box to save a flattened version of the image or set the Maximize PSD File Compatibility option in the Preferences dialog box to Ask or Always. However, I intensely dislike both of these options. (In fact, you should be sure to set Maximize PSD File Compatibility to Never, for reasons explained in Chapter 2.) The native .psd format was never intended to function as an interapplication standard; it was meant for Photoshop alone. So use it that way. If you want to trade a flattened image with some other program, use TIFF, JPEG, or one of the other universal formats explained in this chapter. Special-purpose formats