COLORS: You can change the screen and border colors. To change the screen colors use the right or left arrow. To change the border color press and hold down the Control (Ctrl) key, then press the greater than sign >. BATCH FILES: Batch files are small programs. These little programs are very powerful. They instruct the computer on which command to do next. The book uses Batch files to teach Color Programming and creating Keyboard Macros. Minimum Requirements: CGA, EGA or VGA.