Main menu line interface
Control Key description:
The control keys provided in all menus:
I/M/J/L: Move the vernier to up, down, left, and right.
Enter: Edit finish or OK in function screen.
Space: Toggle selected item to next configure or change the value.
0: to exit the current action mode.
E: to edit the parameter or configuration.
Space: to toggle state.
Enter: Refresh the screen display.
1/2: Up page and next page.
