The item in the selection field defines the sequence of this selection field in the selection tab title.
If you do not define an item number, the system uses the smallest possible number 'zero'.
If you define the same number for several fields, the sequence of these fields is determined by the name of selection table and the field name.
The selection field with the smallest item number is in first place in the selection tab title.
The selection field with the highest item number is in last place in the selection tab title.