This explains how to split downtime periods in the Operations app.
Choose a downtime period and click 'Submit Reason' (1.).
This opens the details for that period of downtime and shows the start time, end time and duration (2.) and possible reasons.
Note: In order to split this period of downtime, a reason should firstly be chosen for the first part. Do this by clicking a reason.
This opens the split time pop-up dialog, which again shows the start time, end time and duration. Use the slider (4.) to assign where the time will be split. The reason already given will be assigned to the first part, indicated in the dialog by the time 'Duration' and a new period of time, will be the 'Remainder'.
Once the split has been completed, you will see the first part of the downtime on the list of downtime under the heading 'Reason given'. You will see the downtime, together with the reason you assigned.