To modify an alarm, go into your LifeHub and click on the 'Alarm Rules' tab.
Pick the alarm that you wish to modify and select the 'Edit' button (pencil icon) which can found to the right of the Status.
Once the 'Edit' tab has been selected, you are able to modify the Rule, Operator Alarm and Control Alarms sections as needed.
Once you have finished modifying your alarm, click 'Save'.
The updated rule will now be synchronised with all systems that are connected to this LifeHub.