The SET SYSMENU command allows or prohibits access to the system menu during program execution, and can also reconfigure the system menu. The system menu configuration command is: set sysmenu on | off | automatic | to [; ] | to [<; Column menu item list >] [set to [default ]| SAVENOSAVE. Usually, it is usually used to restore the system menu to the standard configuration. You can execute SET SYSMENU NOSAVE before executing SETSYSMENU TO DEFAULT.

When using the keyboard to select a menu command, you can directly press the underlined letter in the command, or use the up and down arrow keys to select a command and press Enter to select and execute the command. After the command is executed, the menu will automatically close. When using the mouse to select a menu command, just aim the mouse pointer at the selected command and click the mouse button. If you don't want to execute any commands in the open menu, you can press the "Alt" key, and the opened menu will be closed automatically; You can also click any blank area on the desktop to close the Open menu.