QuarkXPress now offers ability to Split and Span column flow in a single text box.
Column Flow capabilities include:
Split columns – in a single column text flow you can now split selective text into multiple columns.
Span columns – if you already have a text flow in multiple columns, you can choose to select a paragraph (or more) to span across the multiple columns.
Line between – this enables you to add line in-between (in gutter) for two or more columns
Restart/Continuous flow – this is another feature independent of column split and span.
In a multi column flow, you can choose a paragraph and restart the flow