expend/collaps ALL groups with push 2

[niourk]

hi there

according to you is it possible to expend/collaps all groups in the same time in session view with push 2?
in arrangement with the keyboard it's alt + clic, in session view with push i know how to expend/close one group but not all group in the same time.
if someone knows how to do that and if it's possible it's really cool!

thanks