Manual cycles (ie. a cycle that is manually initiated as opposed to a scheduled cycle) can be started by clicking on the "Actions" tab from the schedule page.
In LawnCheck, a manual cycle is called a "Quick Cycle." You can run a quick cycle at any time. However, if the controller has already accepted a scheduled irrigation command you will receive a busy message. If you still wanted to run the quick cycle you would first issue a "reset" action.
You can define and save up to 5 quick cycles. You can also run quick cycles from the Smart Phone web site. The Smart Phone site offers pages designed for a smaller phone screen.