Hi Jeanne,
If you want to show only the year portion of a Date or DateTime field you can also use the FormatDateTime() build in function.
But using het Year() function also works, Year() is especially usefull if you want to calculate with the year like adding or subtracting from it.
The FormatDateTime will output a string, so this gives you more options on how to represent a year.
The output of both functions you can bind to the value property of an expression.
Regards,
Daniel