Hi Christophe,
Thank you for using Syncfusion products.
Query: I need to hide title bar of one view. Is it possible ? or a solution.
Yes, it is possible to hide the title bar of the Document window in Docking Manager. The title bar can be hidden by collapsing the HeaderPanel of DocumentContainer. You can download the sample for the same from the following link:
Sample:
Collapse_HeaderPanelRegards,
Jessie