How to create menu and menu item in dynamics 365?

to display any menu Dynamics 365, you need to create a menu item  as the following 

create a project and add a new item, select user interface from dynamics 365 items as the below 

as you see, there are multiple items items 

output menu item for reports 

display menu item for forms

action menu item for class 

select display menu item and set name, click add

set the label (this label will display for users)  and select object type form 

select the object custgroup for example 

save and build your solution 

Now, we need to create menu for this menu item 

as the same, just right click on your project and add a new item 

select user interface from dynamics 365 items and choose menu as the below 

set name and click add

set label for this menu and select menu item type form 

locate your menu item name  as the below 

you configure it for specific countries by setting country region code

select the menu item, menu item type, and label

create an extension from a menu like accounts recivable as the below 

add sub menu for your main menu

set properties for this menu

then build your project and refresh your browser to see changes.