Search result box headers and columns

How do you add categories to the bar above the search box? Right now I get type, title, status, sections, authors, priority and start time.

I would like to get the slug and inch count at least, if possible.

I seem to recall there was an easy way to do it under your profile or settings, but I can't find it now.

I can't find an answer (at least easily) in any of the online documentation.

Thanks for any help

Tom Fluharty

Carolina Design Center

Greensboro NC