Photoshop uses colors and patterns to represent information about an image that is normally invisible, such as areas that are transparent, or parts of an image that contain colors that cannot be represented by your current display or printing system. The Transparency & Gamut Preferences dialog box enables you to tailor these displays to your own preferences.
For example, transparency is typically shown on the screen by using a gray-and-white checkerboard pattern. You can change the pattern and colors if you prefer another type of display.
Here is a rundown of the options you find in this dialog box:
-->Grid Size: You can choose small, medium, large, or no grid at all. You may want to switch from the default medium-sized grid to a large grid if you’re using a very high resolution setting (such as the 1920 x 1440 pixel setting I use on my monitor) so the grid is a little easier to see. (I don’t bother with this, myself.) Or you can switch to a smaller grid if you’re working at a 640 x 480 or an 800 x 600 resolution.
-->Grid Colors: The default light grid is the least obtrusive, but you can switch to a medium or dark grid if you want. Also, you are not limited to gray-and-white checkerboard squares. To choose custom colors, double-click the white and gray squares below the Grid Colors list.
-->Use Video Alpha: If you have a video board that supports chroma keying, select this option to be able to view video in the transparent portions behind a layer.
-->Gamut Warning: You can adjust the color used to represent out-of-gamut colors and to specify the transparency for the warning color. Double-click the Color box to set the hue and choose the transparency with the Opacity slider. The gamut warning is generally used before converting RGB images to CMYK to see which colors will be lost.
For example, transparency is typically shown on the screen by using a gray-and-white checkerboard pattern. You can change the pattern and colors if you prefer another type of display.
Here is a rundown of the options you find in this dialog box:
-->Grid Size: You can choose small, medium, large, or no grid at all. You may want to switch from the default medium-sized grid to a large grid if you’re using a very high resolution setting (such as the 1920 x 1440 pixel setting I use on my monitor) so the grid is a little easier to see. (I don’t bother with this, myself.) Or you can switch to a smaller grid if you’re working at a 640 x 480 or an 800 x 600 resolution.
-->Grid Colors: The default light grid is the least obtrusive, but you can switch to a medium or dark grid if you want. Also, you are not limited to gray-and-white checkerboard squares. To choose custom colors, double-click the white and gray squares below the Grid Colors list.
-->Use Video Alpha: If you have a video board that supports chroma keying, select this option to be able to view video in the transparent portions behind a layer.
-->Gamut Warning: You can adjust the color used to represent out-of-gamut colors and to specify the transparency for the warning color. Double-click the Color box to set the hue and choose the transparency with the Opacity slider. The gamut warning is generally used before converting RGB images to CMYK to see which colors will be lost.
A gamut is the range of colors that can be displayed or printed. In Photoshop talk, out-of-gamut colors generally are those that can’t be represented by cyan, magenta, yellow, and black and, therefore, can’t be printed. To turn gamut warnings on or off, choose View➪Gamut Warning.
Adjusting transparency and gamut in Photoshop
![Adjusting transparency and gamut in Photoshop]()
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