First, go to your dashboard
Go to your WordPress Dashboard.
Click on Appearance > Menu
Once you are in the main menu settings, you can add a new page from the left menu
Select the new page
Click add to menu
The page will be added to the bottom of the menu
To change the position of the new page within the menu
Drag and drop the page where you want it
If you would like the page link to be in a submenu, drag it to the right once it’s under the desired parent link.
Once you’re finished editing the menu, click Save Menu