Chapter 2 (d) - If your Computer starts with the Default Configuration without
                            displaying the Startup Menu.

  
If your CONFIG.SYS file defines multiple configurations but your computer starts using the default 
configuration without displaying the MS-DOS 6 startup menu, the name of your default configuration 
block might contain disallowed characters such as spaces.
Each configuration block begins with a block header — a block name surrounded by square brackets. 
The block name can be up to 70 characters long and can contain most printable characters. It cannot 
include spaces, backslashes (\), forward slashes (/), commas, semicolons (;), equal signs (=), or square
brackets ([ and ]). If the name of your default configuration block contains spaces or other disallowed 
characters, your computer might not display the startup menu. 
If you want the items on your startup menu to contain spaces, you can use the menuitem command to 
define menu text that differs from the block name. For example, the following menuitem command 
displays the menu text “Start with the network,” and is associated with the [net] configuration block:
  
menuitem=net,Start with the network
  
The following command specifies that the [net] configuration block is the default configuration:
  
menudefault=net
  
For more information about multiple configurations, see the chapter “Making More Memory Available” in 
the MS-DOS 6 User's Guide, or type help multiconfig at the command prompt.

 