To change the URL of a page, navigate to the Content tab, hover over the page whose URL you want to change and click the Settings (gear) button.

You will then see the Page Settings menu in the left column where you can change the URL of the page.

Knowledge Base
To change the URL of a page, navigate to the Content tab, hover over the page whose URL you want to change and click the Settings (gear) button.
You will then see the Page Settings menu in the left column where you can change the URL of the page.