TOF, Short Figure Captions?

[Pedro Sanchez]

When doing the caption for my figure floats, I want LyX to generate the
following LaTeX code:

\caption[My short figure description]{This is a very long figure
description that I don't want to show up in the TOF}

Is there a way to tell LyX about the "My short figure description"
parameter?

-- 
Pedro I. Sanchez