yes 
Yes
They can also copy & paste it. In general I think if someone’s able to type in “https://dev.example.com/principles/able-to-take-part-in-community-life2/example-case-study”, they’re also able to type in “principles/able-to-take-part-in-community-life2/example-case-study”.
Otherwise you could have a pages or pagesdisplay section near the textarea and let them drag and drop the page into the textarea.
