On Web:

Click on Menu > Libraries > Shift Templates > Schedule Templates tab

Click on the arrow to open the schedule template to be edited

Click on the predefined shift to be edited

Choose a predefined shift from the dropdown, in order to replace the current shift with the desired shift.

You can either choose to replace the desired shift to be replaced on the specific day or all days in which the current shift is present.

In case you want to delete a predefined shift from this schedule template, Click on > Delete Shift

In case you want to edit the name of the schedule template, click on it's name

Enter the new name

Click on > Confirm