Global Key
In Deriscope terminology, a Global Key is a special Key that can be supplied as input to any Deriscope Function
It is part of the collection keyset_#31
By default, the Global Keys are hidden and thus not displayed in the Browse Area
If they are ever needed, the user can click on the Tools button
and then select the item 
Alternatively, the user can select the item
in order to unhide the Global Parameters Visibility button shown red-circled below:
Either approach would help in unhiding the Global Keys from the list of all input keys displayed in the Browse Area
For example, selecting the type IRS in the Type Selector and the function Fallback in the Function Selector, would result in the following:
