However, you must begin a pattern definition with a letter or number, not a special character. You can include letters, numbers, and the special characters underline (_), hyphen (-), and dollar sign ($). Hatch pattern definitions follow these rules:
This simple pattern definition specifies a line drawn at an angle of 45 degrees, the first line of the family of hatch lines is to pass through the drawing origin (0,0), and that the spacing between hatch lines of the family is to be 0.125 drawing units.
