problem: some info windows designs require lot of columns. then info window being are too wide.
solution: multi-row behaviour. exactly same way as in print format was implemented in compiere.
1. add to info window> column checkbox - Next line (activates below column)
2. add to info window> column field - Below Column
according to print format help_
Below Column - Print this column below the column index entered. This column is printed in a second line below the content of the first line identified. Please be aware, that this is depends on the actual sequence. Enter a 1 to add the info below the first column._
Workflow: superuser creates a new info window, define columns and define which columns will be rendered below another column.
similar behaviour was implemented thanks to as plugin for datagrid.