Create a new page and add it to the menu
- Open Site Administration -> Appearance -> Pages
- Click on "Add new page/section"
- Enter title, page content and click "Save"
- Copy page URL
- Open Site Administration -> Appearance -> Theme settings
- Scroll down to "Custom menu items" and a new line in following format:
If you want to create a dropdown submenu add "-" at the beginning of the line like this:
- Save theme settings