Hi Guillaume,
Thank you very much for using Syncfusion products.
By default, page breaks are not shown in the Normal view. However, you can view them by inserting new page breaks in MSExcel.
Please go through the following online documentation lin for further details.
http://help.syncfusion.com/ug_92/Reporting/XlsIO/Windows%20Forms/default.htm?turl=Documents%2Fbreaks.htmPlease follow-up the Forum 100134 for further more details.
Please let us know if you require any further clarifications.
Thanks,
Sridhar.S