1. From the Network menu, choose Time interval sets.
The List (Time interval sets) window opens.
2. In the list, click the time interval set of your choice.
3. Click the 
Edit icon.
The Edit time intervals (time interval set <No>) window opens.
You can edit the white fields of the time intervals directly and also perform the following actions:
- Inserting a time interval in a time interval set
- Deleting time intervals
- Sorting time intervals according to start time
- Dividing time intervals
4. Confirm with OK.
