by setting prompt
to be $d $t @ $p$_$g$S
in environment variables
.
reference
Change your DOS/Command prompt
http://www.chami.com/tips/windows/020497W.html
cmd - How do I change the command-line prompt in Windows? - Stack Overflow
https://stackoverflow.com/questions/12028372/how-do-i-change-the-command-line-prompt-in-windows