Hi Greg,
Thanks for contacting Syncfusion support.
Before proceeding with your query, we need below details.
1. Did you mean the fixed width as setting width for all the Grid columns?
2. Resizing any Grid column won’t affect either other columns width or Grid width. Is this is your requirement?
If we misunderstood your query, please provide more details to provide prompt solution.
Regards,
Isuriya R.