Oracle Forms - Disable Show Navigator Icon

There are two ways we can access Show Navigator in Oracle Forms.

1.View - Show Navigator

Command to disable:
 set_menu_item_property('View.Show_Navigator',DISPLAYED,PROPERTY_FALSE);
 
2.Show Navigator icon in Toolbar

Command to disable:
APP_SPECIAL.ENABLE('FILE.SMARTBAR_SHOW_NAVIGATOR',PROPERTY_OFF);