Use the create form on the Menus screen to define a menu's system property and translation.
Steps
On the Menus screen, select Add Menu.
On the create form, enter a value in Name. Use the field for a system property. Use CamelCase, such as
fooBar.In Translation, choose one of
SHOP_MENU_LABEL_HIDDEN,SHOP_MENU_LABEL_PROFILE,SHOP_MENU_LABEL_HORIZONTAL, orSHOP_MENU_LABEL_USEFUL_INFORMATION.Select Save.
Result
After the form fields are completed, Save becomes available.

