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When working with grayscale images or black and white images in QuarkXPress, a number of picture options are available that aren't available when you're working with color pictures. Some of these options are available under the Style menu and others are available in the Colors palette. For example, when you're working with a grayscale image in a document that otherwise is color, you can apply colors to that black and white image and the color can replace either the black or the white pixels. Notice in the Colors palette, you can apply colors to not only the frame and the background of the picture.
You could also apply it to the background color of the picture and the picture itself. In this case, this would be the black pixels and this would be the white pixels. So, let's choose the black pixels and make them a different color. Then we can choose the white pixels and make them yet another color. In addition, because these colors are standard colors in QuarkXPress, you can adjust their shade and their opacity. That way, if something is behind the picture, it can show through a little bit if you want it to.
This kind of effect can be very useful not only in four-color printing, but also in spot-color printing. When you've only got two colors to work with, you can use these techniques to play with the pictures and create interesting effects. The same is true with solid black and white images. You can make the picture a color, you can make its background another color, and again, you can apply shades or transparency levels to either one or both. This is a great way to colorize an item in QuarkXPress without having to go back to the original artwork and colorize it there, plus, it uses the spot colors you've created in QuarkXPress so they're automatically separated when it's time to output.
Let me point you to another interesting feature in the Style menu. First of all, you can invert a black and white image. In this case, it turned green to blue and blue to green. You also have control over what's known as halftones. Let me select this image here to work with the halftones. If you're familiar with printing out pictures on a black and white printer, you know that the dots are laid out in lines and in a grid and the size and frequency of those dots determine what your eyes perceive to be the details of the image.
Well here, you can create some very special halftone effects, which unfortunately, you don't see on screen, but when you print it, can be quite artistic. If you drop the line frequency down to something like 60 and you can choose any angle you'd like and then change the function to one of these, the various light and dark colors in your image will be converted to the dots, lines, ellipses, squares or a dithered pattern. In the end, the effect can be something like an etching or just an unusual rendition of the existing image.
If you're working with black and white images, I encourage you to experiment with these different settings and print them out to see if there is something that might work for you in an artistic way on your layout, because after all, when you've only got one or two colors to work with, you need all the tricks you can get.
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