To cancel multiple "unallocated" shifts, i.e. with no worker assigned, simply follow the below steps:
Go to the Post Shifts screen on the Weekly view.
2. Select a tile that has multiple shifts in it. It will have the count of shifts on the second line - in this example, there are 9.
Please note, there must be multiple shifts booked at the same time on the same shift template to show in one tile.
3. This will open a screen on the right hand side. Here you can select "All", or tick specific shifts.
4. Select "Cancel shifts". This will cancel all selected shifts.
You can also cancel allocated shifts using the same method, if they are grouped into one tile.
See other ways to cancel shifts: