Add item to the main menu

In the administrative toolbar hover over Structure > Menus > Main navigation , and click on Add link

In the Menu link title field, add the label for the menu item (e.g. “News”).
In the Link field, add “/news”. *Note: Do not include source parameters when pasting URLs into news links.
Check the Enabled box so that the menu item will be visible/enabled.
In the Description field, add a basic description (e.g. “News listings”)
In the Parent link field, select <Main navigation>
In the Menu Link Weight field, you can reorder your main menu items by clicking the icon next to each item name, and dragging and dropping to your desired order.
Click Save.

Main navigation