You can easily change the quiz name or picture in the Quizizz editor.
1. First, make sure you're logged in to your Quizizz account.
2. Now go to the quiz you want to edit and click the "Edit" button (just below the "Play Live" and "Homework" buttons)
3. In Quizizz "Create" interface, you'll see an "Edit Quiz Info" button at the top-left (just below the Quizizz logo.)
4. In the popup, you can edit the name or add/replace the quiz image. Click "Done" once you've made your changes.
5. Click the "Finish" button after this to save and publish your changes.