Hello, my name is ***** ***** I will be assisting you today. If I am understanding the question, you are trying to change the prompt in the Command window in Windows. If I am misunderstanding the problem, please reply and let me know.
I am attaching a link to a Microsoft (I know it is Windows XP, but the syntax should be the same) document which describes the prompt command and lists the many character combinations and what they will display. Please let me know if this helps.
This is Gary from JustAnswer just checking in to see if you are still needing assistance.
Enjoy your weekend!