Commands for Defining Multiple Configurations A single CONFIG.SYS file can define several different system configurations. To define multiple configurations, you use the following special CONFIG.SYS commands: To define multiple configurations, follow these general steps: 1 Define a startup menu in the CONFIG.SYS file by using a [menu] header followed by one or more commands. The , and commands can be used to define special characteristics of the startup menu. 2 Create a configuration block in the CONFIG.SYS file for each configuration you want. A configuration block begins with a block header -- a name surrounded by square brackets. To each block, add the that you want MS-DOS to carry out when that configuration is selected from the startup menu. 3 (Optional) In the AUTOEXEC.BAT file, use such as and to have MS-DOS carry out different AUTOEXEC.BAT commands depending on the startup configuration. When a configuration is selected from the startup menu, MS-DOS defines an environment variable named CONFIG and sets it to the name of the selected configuration block. To have MS-DOS carry out different sets of commands for different CONFIG values, add a GOTO %CONFIG% command to your AUTOEXEC.BAT file. For more information about defining multiple configurations, see the chapter "Configuring Your System" in the MS-DOS User's Guide.