How do I create a new running hours machine? Click on  Counters. Click on  New... Fill in the details for the sub-counter. Under  Parent,  select the parent-counter for the sub-counter. Click on  Save & close. Sub-counter behavior : There are multiple options to change the behavior of the sub-counters of a parent-counter. - Add delta value to sub-counters: The sub-counters will be updated by the main counter. - Fill main counter with highest value: The main counter will be filled with the highest value from all of the sub-counters. - Fill main counter with lowest value: The main counter will be filled with the lowest value from all of the sub-counters. - Fill main counter with average value: The main counter will be filled with the average value from all of the sub-counters.