This is Golan Shem-Tov, I am a Solution Architect on the Foglight Pre-Sales team.
Foglight for VMWare VMAlarms dashboard flow is a bit different than the Foglight alarms dashboard but once customers understand the flow, navigation is fast and easy. This is specifically important when fine tuning the rules and alarm to fit your preferred settings as a quick flow from alarms to rules to variables is the one that is repeated frequently.
In the VMAlarms dashbord to see Alarms coming from a specific area (ESX servers, Data center, virtual machines) all you have to do is click on a number in the alarm indication on the top of the page, for example in this image clicking on the any of the alarm numbers under the "Virtual Machine" section at the top of the page will open alarms that are only coming from virtual machines.

A couple of things to note about the alarm messages flow:
1. Clicking on the alarm message will send you to the component (ESX server, Data Center, Virtual Machine) that this alarm is coming from.
2. Clicking on the Alarm Icon will open the alarm details window that allows you to acknowledge the alarm, clear the alarm or take you directly to the rule definition when you click on the name of the rule that was causing this alarm.

Once you are in the rule definition, the easiest way to change a threshold that is coming from a registry variable is to look for the area that is talking about "registry".

If you want to change the threshold of that registry variable the best way is to copy the variable name, go to the "manage registry variables" dashboard and paste it in the "filter by variable name" field.

At this point just edit the variable according to your preferred settings.