To add a shift, navigate to Scheduler by clicking the sidebar heading.

Notice the button in the top right, "+ Add Shift" click this to bring up the shift detail view. Select client, shift type, area, price book, time & location and carer. Remember to click Save. 

Alternatively, click anywhere in scheduler view. Ideally click the day or time, next to the carer you want the shift for.

For more information on how to edit shifts, create recurring shifts and scheduler navigation. See these help desk articles: