Hi Val,

You can manage transformations for appropriate document type in: 'Site Manager -> Development -> Document types -> Edit (CMS.News) -> Transformations tab'. You can make new or edit existing transformation using <ul><li> elements as you demand.

Then if you go to: 'CMS Desk -> Content -> <document> -> Design tab -> Configure icon of web part (probably repeater)' you can set 'Transformation' and 'Selected item transformation' with transformations you've already made. Or you can simply click 'edit' button at the same properties window and edit transformation directly.

For more info please see our Developer's Guide: http://devnet.kentico.com/docs/devguide/writing_transformations.htm

Best regards
Ondrej Vasil