Show long property value for a document

We tried to show descriptions for documents in KM iView. So we did a new layout set and make Collection renderer property "Display properties" equal to the "rnd:icon,rnd:displayname(contentLink),rnd:description". But unfortunatelly the value of description was cut off in the iViews (after it exceeded its unknown length limit) and could be rendered only in one line (i.e. the value was not broken into several lines). How can we make a layout set with a text property (that is usually ~ 250 chars)?