You want to create a keyword field in a layout region using a ComboBox or
ListBox interface and have the default value be null. If you select "Enter
choices (one per line)" as the choices option, the first choice entered in the
list will be displayed by default when composing a document from the form, even
with no default value specified in the formula window. The solution is to enter
the pipe symbol followed by double quotes ( |"" ) as the first choice in the
keyword field list.
This was first published in November 2000