Hi Vadym,
Thanks for using Syncfusion products.
We have created a sample to illustrate the Show/Hide items in the Docking Manager and attached for your reference.
Using DockingMangaer.SetState() method,we can set the state of the items such as AutoHide,Hide,Dock,Document,Tabbed and Float.
Please let me know in case of any queries.
Regards
SuryaNarayanan
F100088_DockMgr_Show_Hide_85f5dd28.zip