DataGrid widget how to?

Could someone please explain how to use the datagrid widget properly such as with Excel data?

Already looked at this page, http://modxcms.com/datagrid-widget.html, but it just describes what it can do and not how.

sorry for the 2 years wakeup but me too need a "how to" for DataGrid widget.
Im trying to insert data and output is vertical text...
anyone got it working properly and mind to share?

Mark i know u know
shade some light on me