How do you change DOS windows' command prompt in Windows 7?

Get help file:

C:\Users\Jay>prompt /?


Changes the cmd.exe command prompt.

PROMPT [text]
text Specifies a new command prompt.
Prompt can be made up of normal characters and the following special codes:
$A & (Ampersand)
$B (pipe)
$C ( (Left parenthesis)
$D Current date
$E Escape code (ASCII code 27)
$F ) (Right parenthesis)
$G > (greater-than sign)
$H Backspace (erases previous character)
$L < (less-than sign)
$N Current drive
$P Current drive and path
$Q = (equal sign)
$S (space)
$T Current time
$V Windows version number
$_ Carriage return and linefeed
$$ $ (dollar sign)



If Command Extensions are enabled the PROMPT command supports the following additional formatting characters:
$+ zero or more plus sign (+) characters depending upon the depth of the PUSHD directory stack, one character for each level pushed.

$M Displays the remote name associated with the current drive letter or the empty string if current drive is not a network

Example: Changing from "C:\" to "%"
-------------------------------------

C:\Users\Jay>prompt %--->Changes to %
%
%Prompt C:\ ------------->Changes back to C:\
C:\
C:\