ComboBox.ListItemsEditForm Property (Access)
Gets or sets the name of the form that is displayed when the user clicks Edit List Items. Read/write String.
The AllowValueEditLists property determines whether the Edit List Items command is available when the user right-clicks a combo box that's bound to a Lookup field.
If the Lookup field is bound to a table or query, then the form specified by the ListItemsEditForm property is displayed when the user clicks Edit List Items. The user can use the form to add, delete, or edit the items to be displayed in the combo box.
The ListItemsEditForm property is not available for combo boxes on a report.