LyX ⇒ Shortcuts for "environment menu"

[usr]

Is it possible to change the "environment menu" (I mean the list which is on the left of the toolbar and contains section, chapter...) by shortcuts?

It would be the best to change it for example by tiping Ctrl+Alt+C to change to the environment "chapter". I saw that one can make a lot of such configurations in the menu Tools->Configurations->Shortcuts (I think that must be the name but I don't exaktly know because I use the German Lyx). But I am not able to define my own shorcut here because I don't know the name of the function which is responsible for the environment. (My German Documentation contains nothing about that.)

Do you know how to do that?
Thanks for your help!

usr
(Lyx 1.6.9)