If you wish to deallocate a worker or cancel a shift, then you can do this from the shift details page. You can get to this page by clicking on the appropriate shift and then clicking on the shift details link.
At the top of the screen on the right hand side is a red deallocate worker button and a red cancel shift button.
Clicking on either button will bring up a confirmation screen. Here you will need to select a reason why the worker/shift has been cancelled. You can also add an optional message to the worker.
Please note that if a worker is deallocated from a shift, this will become an unfilled shift that you can now assign another worker onto.
You can also watch our tutorial video below on how to do this.