%select_items — filter columns that should be displayed in subsequent tables
%select
[ item|group
] [ ...]
This statement should only be used within %Page statements. It selects the columns that are to be displayed in subsequently specified tables either by their column name (item) or by item groups defined with the %Itemgroup statement.
%Itemgroup SYSTEMTESTS cpu disk %select_items SYSTEMTESTS msgs conn %table ALL
will display a table with the rows cpu, disk, msgs and conn.