Step 1:From managing your site click Edit.

Step 2:Go to the taskbar and click Pages

Step 3:You will see the control panel of your site pages.

Step 4:Once you click on the page you want to change its name, a rectangle on the left where page details will appear, click Delete the page.

Step 5:Make sure that the page you are deleting has no affiliated subpages so that you are not deleted with it once you are deleted you will not be able to recover page information