Phil Waclawski's Photoshop Homework

Review Questions Week 3

1. What color mode is used most for the 4-color print process (professional printing, not desk-top printing)?
   • CMYK: Most printers use CMYK (cyan magenta yellow and black). Even my own printers use those colors at home.
2. True or False: Television sets, computer monitors and movie projectors use the CMYK Color Mode to display colors. Why or why not?
   • They have three color guns (if they are a cathode ray tube, CRT) or something approximate with an LCD, which are red, green, blue. They use a mixture of these to generate colors, which is different from CMYK.
3. What does RGB and CMYK stand for?
   • RGB - Red Green Blue, it is an additive process, where you add more and more of a color to make it brighter, and mixing the three in various proportions gives you your roughly 16 Million colors
   • CMYK -Cyan Magenta Yellow and Black, a subtractive process, used primarily by printers.
4. Describe two ways to access the Color Picker.
   • Click on the foreground or background color in the tool menu.
   • Do the same in the color palette window
5. If you needed to work with an exact shade of a color and had only the RGB values, where would you input these values to obtain that color?
   • In the color picker. There are three text boxes for R G and B. There is an even cooler box below that has the # in front of it, where you can type in the hex values for RGB directly (FFCC33 for instance, is a nice golden yellow color). There is also a small box that warns if a color is not "web safe" or one of the 216 colors that are safe.
6. If you see the Alert Triangle in the Color Picker, what does this tell you and how would you take care of this?
   • The color is "out of gamut" or out of the CMYK printing range. You can click on the triangle or the color square below it, which is the nearest CMYK printable color to the color you presently have picked.
7. How would you find out a color's Hexadecimal code for use on a web page?
   • It is in the # text box just below the R G B text boxes on the color picker tool.
8. List three ways to change the Foreground and/or Background colors.
   • Click on the foreground/background color in the toolbar that you want to change, then choose the color from the color picker that comes up.
   • Do the same in the color palette menu
   • Choose foreground or background color in the color palette menu to make it active, then go to the color swatches palette and choose a color from there.
   • And you can use the eyedropper tool as well.
9. Other than using the Zoom tool, what's another way to change the magnification of an image?
   • Use the slide bar in the Navigator Palette
10. Other than the Color Picker, where else could you easily find the particular RGB or CMYK values of any pixel within the canvas?
    • The color palette box. As you slide the cursor over the image, it gives you the values in decimal rgb (default) or use the menu and change it to CMYK sliders.