You can access the navigation menu to edit it and make the required changes in several ways. Here is how:
1. Hover over the Navigation section in the top horizontal bar menu to activate the Navigation editing menu.
Click on the stacked line icon to edit the navigation.
2. Hover over the top horizontal area of your website page so the blue line appears. Click on the stacked line icon to access the Navigation settings menu.
Continue managing the navigation as required. Once done, click Publish to make your changes live.