Hi Jorge,
Thanks for using Syncfusion products.
You can achieve your requirement by using the “SetShowCloseAllMenuItem” method as follows:
Code snippet [C#]:
DockingManager.SetShowCloseAllMenuItem(Docking, false);
We have prepared a sample based on this and you can find the sample under the following location:
Sample :
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=Sample617504367.zipPlease let us know if this helps.
Thanks,
Karthick