Add a menu item
Click New at the top
Add the Menu Title (best to keep it short to fit)
Select the Menu Item Type (see further below for details)
Choose the Menu group if not already selected
Optionally set the menu as a submenu by selecting a parent item
Menu Item Type
This option determines what component will be assigned. Select the type most appropriate to what you need to set the menu item.
Each type will display options which also should apply to what you need linked.
This option is to set the menu item type to Articles > Single Article (aka page)
Click Articles then click Single Article
When the type is selected, the modal window will close.
The next view is showing the selected type and now the method to choose the page
Note: each component type has different setup options.