Hi Muhammad,
Thank you for contacting Syncfusion support.
We have analyzed the reported issue and at present we do not have support to add textbox field in PDF document header. Could you please provide us the below details, it will helpful for us to provide the precise solution on this.
- Are you adding text in the header of PDF document
- Simple sample / code snippet to reproduce the issue
- Complete error details
- Product version
Please let us know if you have any concerns on this.
Regards,
Desika