What is the smallest duration?

What is the smallest duration you can enter as a chord? Is it possible to have a chord change only an eighth note in length? Thanks

Eighth notes are not possible. The shortest is quarter notes.

You may find something of interest in this thread:
http://www.irealb.com/forums/showthr...-on-half-beats
:))BOB

Thanks guys the work arounds are useful and a wee bit confusing.