Hi Soon,
Thank you for contacting the Syncfusion Support,
We have prepared a sample that tries to meet your requirement. In order to set the Document tab on the rightside of the Dockingmanager, the SetTDIIndex property of the TDILayoutPanel is need to set as True. This property isused to set the new child at the desired index in the Document state. We have demonstrate the same in our sample. Please download the sample using the below link:
Sample:
DockingManager_DocumentTab.zipFor more information please find it using the below Knowledge base article:
KB link:
http://www.syncfusion.com/kb/3346/how-to-add-a-new-child-with-document-state-at-specific-index-position-in-dockingmanagerPlease let us know if you have any other concerns,
Regards,
Vijayalakshmi V.R.