In FM 12 strct environment, how to add a new value to the attribute of a pre-existing element?
My main problem is that I don't know Where (what dialog that I can make appear) I make the edit from at this stage.
Goal: I am missing an attribute value for an Element titled "SafetyMsg" that I wish to add. The missing value is "WarningElectrical".
The SafetyMsg element currently has an Attribute Name titled "a_Type", containing 3 values: Danger, Warning, and Caution. See pic:
My issue is that I want to add a 4th value, WarningElectrical, to the drop-down list above.
Very importantly, each of these values contains a framed graphic in the Reference Page (the 3 that work along with the new WarningElectrical value).
Here's a pic of WarningElectrical on the Ref page (bottom menu viewable so you can see its name):

Note: WarningElectrical uses a different yellow triangle graphic than the other values although its still a warning.
Please list steps so I can access how to add this value to the SafetyMsg element.
Huge Thanks for your time!
