You can allocate time off in the booking screen by selecting the time slot/multiple time slots and pressing 'a'. This will show the box as below. In this box you enter a percentage to show the amount of the slot(s) you wish to allocate.
Euro Systems Projects Limited, a company limited by shares, registered in England (reg no. 2550976) Registered office: Europa House, 1 Kimpton Link, Sutton, Surrey SM3 9QP