You can schedule a report by clicking on Schedule. A module will appear asking you for a name for the report, an email address where to send the report and a frequency interval.
You can generate a scheduled report any time by clicking on it on the sidebar. You can expand the list by clicking on See More.
You can't edit a scheduled report but you can open it, update it and re-schedule it as a new one. You can then delete the old one from See More