Shedul's been designed so that only you can double book if you choose but clients booking online through the widget will never be able to.
To double book, click on the green '+' button on the bottom right of your calendar tab.
While double booking internally, staff members would be alerted with a notification that says for example 'Wendy Smith isn't available at 10:00 am but you can still double book' (see below).
Having said that, we do have a Processing Time feature which means you may not need to double book at all! Processing time allows you to service another client whilst one clients hair dye or facial is developing.