═══ 1. Keys Help ═══ The list of keys is arranged in groups: ACCELERATOR KEYS F3 Exit program HELP KEYS F1 Get help F2 Get extended help (from within any help window) Alt+F4 End help F9 Go to a list of keys (from within any help window) F11 Go to the help index (from within any help window) Esc Previous Help Panel, or End help if only one panel Alt+F6 Go to/from help and programs Shift+F10 Get help for help ═══ 2. Extended Help ═══ What Is Color Point? Color Point is an OS/2 Presentation Manager program that continually reports the value and English name of the color of the pel (pixel) that happens to be under your OS/2 PM mouse pointer. The color value can be displayed according to several different color representation models, including RGB (red, green, blue), CMY (cyan, magenta, yellow), HSV (hue, saturation, value), etc. Color Point is especially targetted to users of laptop and notebook PCs with grayscale LCD displays. Editing OS/2 or Windows program icons, drawing charts, obeying program instructions to "Press the red button", and so forth on such systems is often difficult due to the user's inability to discern colors on the gray display. Color Point was written in an effort to make these tasks easier. Color Point might also be found useful by people who are color blind or who have poor vision. The Color Point Window The Color Point window displays information about the pel (pixel) under the mouse pointer. o The "Screen Pointer Position" gives the X (horizontal) and Y (vertical) position of the pointer on the screen. Coordinates [0,0] represent the lower left corner of the screen. o The "Color Value" gives a description of the color in terms of the color model that has been selected. o The "Color Name" gives a technical name for the color and, in parentheses, a more descriptive artistic name if one is available. How Do I Get Rid Of That %$#@ Logo Screen? Color Point consults your OS/2 system configuration parameters to determine how long it should display its initial logo screen. After you install OS/2, the logo panel display time is 'indefinite', and you must press ENTER to dismiss the panel. You may change the logo panel display time to any desired value in milliseconds, including 0, in one of the following ways: o Under OS/2 PM 1.3, bring up the Desktop Manager menu and select the "Group - Utilities" option. Under this menu, select the Control Panel application. The logo display time value can be changed via an action bar menu item. o Under OS/2 PM 2.0 with the Workplace Shell (WPS), open the "OS/2 System" folder on the desktop. Under this folder, open the "System Setup" folder, and select the System icon under this folder. The logo display time value can be changed via one of the notebook 'tabs'. ═══ 3. Help For 'Exit' ═══ Selecting this menu option will end the program. ═══ 4. Help For 'Color Model' ═══ This option provides you a choice as to how the color information will be presented in the window. A list of color models will be displayed for you to choose from. Color information can be represented in a number of different ways based on the particular color model being used. The default color model used by Color Point is the RGB color model. For complete technical information on color models, please see: Computer Graphics: Principles and Practice, Foley, van Dam, Feiner, and Hughes, Second Edition, 1990, Addison-Wesley, ISBN 0-201-12110-7. ═══ 5. The RGB Color Model ═══ In the RGB color model, each color is represented as a combination of the three primary colors red, green, and blue. These three colors are additive primaries, so any arbitrary color can be expressed as result of the addition of various amounts of the three colors. Black is the result of the addition of 0 parts red, 0 parts green, and 0 parts blue; white is the result of the addition of maximum red, maximum green, and maximum blue. Magenta is the result of the addition of equal parts red and blue. The RGB color model is most often used to represent colors on color CRT monitors. ═══ 6. The CMY Color Model ═══ In the CMY color model, each color is represented as a combination of the three primary colors cyan, magenta, and yellow. These three colors are subtractive primaries, so any arbitrary color can be expressed as result of the subtraction of various amounts of the three colors from white light. White is the result of the subtraction of 0 parts cyan, 0 parts magenta, and 0 parts yellow from white light; black is the result of the subtraction of maximum cyan, maximum magenta, and maximum yellow from white light. Red is the result of the subtraction of equal parts magenta and yellow from white light. The CMY color model is most often used to represent colors on devices which use colored inks or paints, such as color printers. ═══ 7. The CMYK Color Model ═══ The CMYK color model is much like the CMY color model, but it includes black (the 'K' in CMYK) as a fourth color. The CMYK color model is used in the four-color printing process. ═══ 8. The YIQ Color Model ═══ In the YIQ color model, each color is represented as a combination of three components: the luminance (Y) and the chromaticity (I and Q). The YIQ color model is used by the U.S. commercial television broadcasting industry. Color values are encoded in the YIQ model and broadcast to televisions. Black-and-white televisions use only the Y component, and color televisions use the I and Q components as well as the Y component. ═══ 9. The HSV (HSB) Color Model ═══ In the HSV color model (sometimes referred to as the HSB color model), each color is represented as a combination of hue, saturation, and value (sometimes referred to as 'brightness'.) The hue is an angle value, measured around an imaginary axis where red is at 0 degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through cyan, blue, magenta, and back around to red. Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are whitish/grayish colors and higher values are more vivid colors. Value, or brightness, is the magnitude of the color's intensity, or brightness. Note: With this menu option, all values are normalized to fall between 0 and 255. This is how HSV colors are represented in OS/2 and Windows. The HSV color model is a user-oriented color system designed to be familiar to artists and other users of color. ═══ 10. The HSV (HSB) Color Model (Degrees) ═══ In the HSV color model (sometimes referred to as the HSB color model), each color is represented as a combination of hue, saturation, and value (sometimes referred to as 'brightness'.) The hue is an angle value, measured around an imaginary axis where red is at 0 degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through cyan, blue, magenta, and back around to red. Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are whitish/grayish colors and higher values are more vivid colors. Value, or brightness, is the magnitude of the color's intensity, or brightness. Note: With this menu option, hue values are represented as degree values, saturation values are represented as values between 0.0 and 1.0, and the value/brightness lies between 0 and 255. The HSV color model is a user-oriented color system designed to be familiar to artists and other users of color. ═══ 11. The HLS Color Model ═══ In the HLS color model, each color is represented as a combination of hue, lightness, and saturation. The hue is an angle value, measured around an imaginary axis where red is at 0 degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through cyan, blue, magenta, and back around to red. Lightness is a value ranging from 0.0 for black to 1.0 for white. Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are whitish/grayish colors and higher values are more vivid colors. Note: With this menu option, all values are normalized to fall between 0 and 255. The HLS color model is a user-oriented color system designed to be familiar to artists and other users of color. ═══ 12. The HLS Color Model (Degrees) ═══ In the HLS color model, each color is represented as a combination of hue, lightness, and saturation. The hue is an angle value, measured around an imaginary axis where red is at 0 degrees, yellow is at 60 degrees, green is at 120 degrees, and so forth through cyan, blue, magenta, and back around to red. Lightness is a value ranging from 0.0 for black to 1.0 for white. Saturation is a ratio value ranging from 0.0 to 1.0, where lower values are whitish/grayish colors and higher values are more vivid colors. Note: With this menu option, hue values are represented as degree values, lightness values lie between 0 and 255, and saturation values are represented as values between 0.0 and 1.0. The HLS color model is a user-oriented color system designed to be familiar to artists and other users of color. ═══ 13. Help For 'Save Window Position' ═══ Select this option to be given the opportunity to save the current position of the Color Point window on the screen. The program window will appear at this saved position each time you start Color Point. The window position data will be saved in a file named COLORPT.INI, which will be created in the current directory. You may, if you wish, move COLORPT.INI to any other directory listed in your DPATH environment variable string, and Color Point will still be able to find it. ═══ 14. Help For 'Save Program Options' ═══ Select this option to be given the opportunity to save your current program option selections, such as your selection of color model. These saved options will be used each time you start Color Point. The program options data will be saved in a file named COLORPT.INI, which will be created in the current directory. You may, if you wish, move COLORPT.INI to any other directory listed in your DPATH environment variable string, and Color Point will still be able to find it. ═══ 15. Help For 'About' ═══ Use this choice to see information on the program's author, the program version number, copyright information, etc.