Hi Artemy,
Currently we don’t have support “Stacked Header” in Grid widget and this feature will be available in any one of our upcoming release.
You can create a custom widget for the Spreadsheet control for your requirement and it can be added in to dashboard designer.
- Please refer link to prepare and configure spreadsheet control for your requirement
- Refer here, how to create a custom widget for your JavaScript (Spreadsheet) control
- Import the SYCW file into dashboard designer and can be used as built-in widget. Please refer this link to know more details for importing the custom widget.
For your convenience we made simple Spreadsheet custom widget and it can be downloaded at
here.
Please let us know if you need any further assistance.
Regards,
Gayathri M