Windows 7 (and I believe Vista) doesn't support the full-screen feature for MS-DOS or Command Prompt console. It doesn't even allow full-screen when using the Command Prompt via Windows 7's Windows XP Mode. On Windows XP, it can be set to full screen via Alt + Enter or right-clicking the console title bar and selecting Full Screen.
A possible workaround on Windows 7: With Command Prompt open, right click the console title bar, then select Properties. Within the Layout tab, you can adjust the width and height. My suggestion is: Adjust only the width to match the width of your screen. Once the adjustments are made, double click the console title bar. Using this workaround gives it the closest full-screen effect that can be achieved.
Windows Vista/7 or XP? – SgtOJ – 2011-08-30T08:17:32.993
Windows XP (no choice in office) – Wernight – 2011-08-30T09:04:17.367