Hi Ivan,
I am afraid such a feature is not supported in the current implementation of XPMenus framework. However, as a workaround you could use two different BarItems with a common Click event handler so that the same task is done when either of them is clicked. Please refer to the
test sample attached here that illustrates the same and let me know if this workd for you. We appreciate your interest in Syncfusion products.
Regards,
Guru Patwal
Syncfusion, Inc.