About Tile Clusters (DCL)

You can group tiles into composite rows or columns (known collectively as clusters).

For layout purposes, a cluster is treated as a single tile. The row or column can be boxed, with an optional label (a cluster without a box cannot be labeled).

Users cannot select a cluster, only individual tiles within the cluster. Clusters cannot have actions assigned to them, with the exception of radio rows and radio columns. The following tiles define clusters:

boxed_column	dialog
boxed_radio_column	radio_column
boxed_radio_row	radio_row
boxed_row	row
column