Ans: Our front office view is-
To do this, we need to follow the same procedure as we described in "How can i add new elements in menubar" section.
After creating a new element as parent element, we will need to drag & drop the element under the parent element in our back office section.
After drag & dropping, 'Accessories' is taking place below the 'Computer' as child element in back office section.
Now if we refresh our front office page, the child element (Accessories) will be seen under its parent element (Computer).
Child element (Accessories) is seen below the Parent element (Computer)