Hi Walter,
The functionality you want to achieve is doable using the dataExport property.
More about it you can find in the Grid API and also in the Docs section we have a code example on how to have similar functionality.
Link to the mentioned documentation: https://www.htmlelements.com/docs/grid-export-selected-records/
Please, do not hesitate to contact us if you have any additional questions.
Best regards,
Yavor Dashev
Smart UI Team