Session manager

[Steve Cooke]

Hi,

I use xfce 4.0.6 and have been thinking that I'd like to upgrade to the 
new 4.2. I have been lurking on the list for quite some time and have on 
occasion seen mention of a session manager. I have absolutely no idea 
what a "session manager" is, what it does, nor why you would even need 
one. There appears to be no such beast in 4.0.6 - or maybe it is hidden, 
exactly the way it should be. It should be entirely transparent to me as 
I have no need/desire to know about such things.

Could someone please enlighten me - and please tell me that the 
functionality IS actually hidden.

Thankyou,

Steve Cooke.