'Boxes' closed at file opening

[Nicola Focci]

Hi!
I'm an Italian and happy LyX user.
I'm so happy that I wrote an italian tutorial, free for download (
http://www.lulu.com/content/2306671).
Just a question: is there a way to have all the "boxes" in the working area
(ERT, floats, ecc.) closed at file opening?
In LyX 1.5.4 (Mac & Win), the ".lyx" file opens with all the boxes expanded.
If the document has many of them (particularly float images), I find the
text scrolling to be difficult, an "jumpy".
Thanks!
    N.