Step 1 : From any of the calendar views (day/week/month/swimlane), select a visit from the recurrence you would like to copy and open it.
Step 2 : Select the "Copy" button at the top of the visit dialogue
Step 3 : Choose if you want to copy only this single visit or copy all future visits. This will then open up the "New Client Visit" dialog initialized with the same information as the visit currently being copied.
Step 4 : Edit the relevant information and click on "Create Visit"