That’s a feature request that’s more done in threads throughout the forum.
AFAIK it’s not possible for Torben to implement more columns because of the Evolution of mAirList.
But why don’t you use the standalone database app for searching? You can copy an element with CTRL+C and insert it in the playlist with CTRL-V.
(I suggest to use the standalone app, because the db window startet from the Playout freezes the GUI of the playout when doing long lasting task like extensive searches!)
Or, as I do it, add important or additional notations in Square Brackets (or any separator you want) subsequent of the Title and use this script from @tondose to remove everything in between the seperators only when loaded into the player…
So you can attach the information right to the Title info and see it right in the Browser…