Step 1 - Click on "Edit" next to the site name in your dashboard.
Step 2 - Hover over Settings, and click the button “URL Rewrites” tab.
Step 3 - Click “Add New URL Rewrite,” put in the old page URL slug (the part of the URL after the "/") , and tell the system which page or offsite URL it should redirect to. Save your changes, and you’re done!
Note: You can view the site's existing URL Rewrites by clicking on the URL Rewrites tab as well.