View a Function's Type and Description
To view the data type of a function input or output argument:
1.Make sure that the Show tips 
toolbar button is enabled.
2.Move your mouse over the argument part of a function.
To view the description of a function:
1.Make sure that the Show tips toolbar button is enabled.
2.Move your mouse over the function (this works both in the Libraries pane and on the mapping area).
