ois wrote:how do I do it?
First you need to get your installation up to 2.2.3 (or later). Check the release notes for instructions. There are a few things that need to be done so if you feel it's all a bit too hard, just wait a few weeks until 2.3 is released since it will have proper installer that will handle the upgrade process for you.
Then, open the channel's Properties dialog, click on the <i>Item pane</i> button in the bottom-left of the first page and add the columns you want.