The VGA 50-line mode shows 35 directories in the directory window compared with the standard 14, and the small file window shows eight rather than four lines of files. The large file window has 44 lines compared to 19. Useful for showing more of your disc contents, but the type is of course much smaller. If you have a 15-inch or 17-inch VGA monitor it may well be worth adopting 50-line mode as your default.
Tom Ruben