It depends on how your employer uses Clockgogo Cloud. For example, suppose you are required to punch card at 0900, 1200, 1300 and 1700 per working day. Now you would like to apply a half-day leave in the morning.
Case 1: You can keep on punch card as 1300 (lunch-in) and 1700 (work-out). Afterwards, administration user can manually adjust the working day, late and working hour result on this date for you.
Case 2: Administrator create a half-day shift which requires punch card record at 1300 (work-in) and 1700 (work-out). This way, an employee taking morning half-day leave should punch card as 1300 (work-in) and 1700 (work-out).