Field help (APNMENVIS) 

This field is used to view part of a menu instead of viewing the whole menu.
This makes it possible to optimize the display in order to save time. Indeed the loading procedure can be very lengthy in the event of menus using many functions.  

If this field is empty or fed with a menu which is different from the original menu, the next/previous arrow icons enable the other parts of the original menu to be viewed.