booleans on existence in tablemaker

[Dave Matthews]

Frequently I'd like to be able to ask tablemaker to show only lines that have
a value in one OR another column.  E.g.

Colonne 1 
Class Sequence 
 
Colonne 2 
Optional 
Class Keyword 
>From 1 
Tag Keyword 
 
Colonne 3
Optional 
Class Text 
>From 1 
Tag Title 
Condition *gene*

Colonne 4
Mandatory
Condition %2 OR %3

Column 4 is my wish, doesn't really work.  I want it to show a line if 
either column 2 or 3 has a value.  Is something like this possible?

- Dave