In the installation of NAV using RoleTailored Client (RTC) when you set the TableRelation field’s property in the definition of a table, automatically, in the Pages that will display this field, will show a DropDownList control.
If the user click the drop-down button it will display a windows a list of fields with the primary key columns plus a text field only if his name will be Name or Description (both case-sensitive).
HOW TO choose columns to show in Drop Down window in NAV?
Design the table using Microsoft Dynamics NAV Development Environment then click on the menu View -> Field Groups and create a line with Name DropDown (case-sensitive) and in the Group insert the list ordered of the columns that you want display in the window linked with the DropDownList control.
Note: it’s not important the ID number, to work the system require the name will be exactly DropDown (case-sensitive), you cannot create more than one line with the same Name.
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