Manual schedule start

I have Fixed schedules that run three days a week. How do I manually start the schedule to run on another, additional day? I don’t want to add a fourth day to the regular setup; just add an occasional extra day of the whole schedule. Where on the Rachio app do I start my Fixed schedule manually?

Blue arrow bottom right of the screen when you open the app. You can either run individual zones or click on the schedule tab at the top of the screen and run your schedule. Hope this helps