How to change the URL for Dynamic Item pages?

I have a Dynamic Page set up to display Items from a Database, and I want to change the URL from what I initially set it to. When I go into the page menu and try to change the URL, there is no option that lets me set up a new URL pattern for my dynamic item pages. The current URL set up is causing issues since the URL can be the same for multiple DB entries and the Wix site will only show the most recent DB entry.

You have to change the URL from the Content Manager (Now CMS).