Hi Karim,
Thanks for contacting Syncfusion support.
According to your query you need to add a button in the column of the grid. We suggest you to use the command column feature of the grid control in which you can add the custom buttons. Please refer the below documentation for the details of command column.
Refer the below link for online sample.
If you need any further assistance please get back to us.
Regards,
Sathyanarayanamoorthy