Designate a substitute for a shift You can substitute a shift from the on-call calendar. Before you beginRole required: rota_admin or rota_manager Procedure Navigate to On-Call Scheduling > On-Call Calendars. Select a Group. The rotation schedules are shown for that group. Double-click the appropriate shift. Select Provide on-call coverage for another roster member. Select the Member scheduled to work the shift as a substitute. In Covering on, select the desired roster or All. Click OK. The changed shift is shown in orange and the information for the roster schedule entry states the selected shift, for example, Primary coverage, or Secondary coverage. If you selected All, the member you selected covers for all rosters at that particular time and as many entries are made as there are rosters. The final result looks like the following illustration.