I have the Analysis Tookpak add-in and the xnpv function works
correctly. However, when I type it into the worksheet, Excel does not
show the correct syntax for reference as it does for other functions
(such as npv). E.g. when I type in a cell "=xnpv(", Excell will not
show the proper syntax - although it does when I go through Insert-
Function.

Is there a way to change this?