Diff Reset or clear

you can take a look at the online help
btw,
reset: RESET all the filters set on a record variable (works only for record and recordref variables)
clear: reset the filters(if the variable on which is applied is a record/recordref), and CLEAR the value of a variabale (works with every variable type).

You can also make a shortcut to your desktop to here:
http://msdn.microsoft.com/en-us/library/dd301468.aspx