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just before saving. Let's suppose you want to open an RGB image that is in Adobe RGB and the current working space is sRGB. If the ‘Preserve Embedded Profile’ option is selected then the default behavior would be to open the file and keep it in Adobe RGB without converting. You could carry on editing the image in the Adobe RGB color space up until the point where it is desirable to carry out a conversion to another color space. To make a profile conversion, go to the Edit menu and choose ‘Convert to Profile…’. The Source space shows the current profile space and in ‘Basic’ mode, there will be a single Destination Space menu that will most likely default to ‘Working RGB’ (which in this case would be sRGB). This menu lists all of the available profiles on your computer system (see Figure 12.24). However, if you click on the Advanced button, you will see the Convert to Profile Advanced dialog (Figure 12.23) where the Destination Space options are broken down into color mode types, such as: Gray, RGB, Lab and CMYK, plus other more esoteric options such as Multichannel and Abstract profile modes. Because the color modes are segmented in this way, this makes it easier for you to access specific types of profiles when carrying out a conversion.

Figure 12.24 The profile list displays all the profiles that are available on your computer.

Figure 12.23 Convert to Profile (shown here in Advanced mode) is located in the Edit menu and can be used to convert color data from one profile color space to another profiled space, such as when you want to convert a file to the profiled color space of a specific output device.

The Convert to Profile command is also useful when you wish to create an output file to send to a printer for which you have a custom-built profile but the print driver does not recognize ICC profiles. For example, one of the printers I used to use was the Fuji Pictrograph. I had built a custom profile for this printer, but unfortunately there was no facility within the File Export driver to utilize the output profile. Therefore, I used the Convert to Profile command to convert the color data to match the space of the output device just prior to sending the image data to the printer.

Whenever you make a profile conversion the image data will end up in a different color space and you might see a slight change in the on-screen color appearance. This is because the profile space you are converting to may have a smaller gamut than the one you are converting from. If an opened image is not in the current working color space, or has been converted to one that is not, Photoshop appends a warning asterisk (*) to the color mode in the title bar (Mac) or status bar (PC) to indicate this.

Assign Profile

When an image is missing its profile or has the wrong profile information embedded, the color numbers become meaningless. The Assign Profile command (Figure 12.25) can be used to correct mistakes as it allows you to assign correct meaning to what the colors in the image should be. So, for example, if you know the profile of an opened file to be wrong, you can use the Edit Assign Profile command to rectify this situation. Let's suppose you have opened an untagged RGB file and for some reason decided not to color manage the file when opening. The colors don't look right and you have reason to believe that the file had originated from the sRGB color space. Yet, it is being edited in your current ProPhoto RGB workspace as if it were a ProPhoto RGB image. By assigning an sRGB profile, you can tell Photoshop that this is not a ProPhoto RGB image and that these colors should be considered as being in the sRGB color space. Most of the time, assigning sRGB will bring the colors back to life and if that doesn't work, then try one of the other commonly used RGB workspaces such as Adobe RGB or Colormatch.

Figure 12.25 The Assign Profile command is available from the Edit menu in Photoshop. Edit Assign Profile can be used to assign a new correct profile to an image or remove an existing profile.

You can also use Assign Profile