Hi Mark,

For multiline text edit, we have a special built-in textarea editor. You can check it out here: TextArea Editor in Smart Grid. (htmlelements.com)

As for a custom edit dialog – we do not have such API at present. We will add a work item which allows such customization in the next release of Smart.Grid component.

Best regards,
Peter Stoev

Smart UI Team
https://www.htmlelements.com/