Prompt $P$G

to make the prompt look like this:

C:\>

This prompt will remain in effect until you change it or close the command window.

If you'd like to change the prompt permanently, click Start|Settings|Control Panel and double-click System. Next, click the Environment tab and click in the Variable text box. Type Prompt, then click in the Value text box. In this box, you need to enter your new prompt text. Sticking with our original example, you could enter

Prompt $P$G

Now click Add, then click OK to close the dialog box. When you open the command prompt window again, it will display your new default prompt.