I think @Bagmichael1 is after a similar feature that i use, related to what @Linn has mentioned above.
I have multiple saved but disabled manual watering schedules. I run flex daily normally, but sometimes use the manual schedules to add frequency when i plant new items, while maintaining the water database correctly. for example, I have a manual disabled schedule for all of my grass zones. I can select "Edit watering schedule", select the grayed "Grass" schedule, then either run as is (2 min each zone) or edit it for the conditions, then run it. I can simply repeat every few hours or every day as i think it needs to deal with the new seed etc. This is far easier than using the sprinkler icon and manually adjusting every zone multiple times a day.