To insert a clocking record while on the clock, tap on the clocking context menu … button from the scheduler, shift, or clockings pages of the current shift. You can then clock in or clock out. 

The new clocking record will be recorded in the shift’s Clockings page. You can then adjust the timing of the clocking by tapping the timestamp and using your device’s time picker.

This procedure is useful when, for example, you forget to clock in or out during break periods.