Hi Customer,
Thanks for contacting Syncfusion Support.
We have checked your query that you are expected to customize the Grid header elements. We have already discussed the KB about how to customize the grid appearance using custom CSS. For your convenience please find the following KB in the below link.
Please ensure that you need to achieve the customization as like the above KB. If we misunderstood your query, could you please share us the additional information about your requirement given below.
1. Have you expected to customize the Grid header text and headercell.
2. Screenshot/Video about your requirement.
3. Exact scenario you need to acheive.
The provided information will help us to analyze and provide you the solution as early as possible.
Regards,
Farveen Sulthana T