Use this command to switch back to 'Normal' mode from either 'Single user' mode or 'Lookup only' mode. To select this option, go to the 'File' menu and click on 'Normal'. When this option is selected, a circle-shaped bullet appears to the left of it. To switch back to 'Lookup only' mode or 'Single user' mode, go to the 'File' menu and click on 'Lookup only' or on 'Single user' respectively. The circle-shaped bullet will move to the left of the option you select.
The 'Normal' menu option does not appear in single user systems.