The Argument Details Window allows you to edit all aspects of an add-in function's argument, including its name, description and signature.
You can open the window in several different ways:
In the XLL+ Function Wizard,
select an argument and press the "Details" tool, which is positioned
above the Argument Grid.
In the XLL Add-ins window, select an argument
and click on the "Design" tool.The window is divided into four tabs. Folloe the links below for information about each tab.