vacation button

I have just started playing games and have been looking for the vacation button, just in case I should need it.  Can someone please tell me where to find it?

(This was answered for me, but please see second question in post number 4.)

In settings.  Remember to save your preferences after using it or it will not count.

Here is Plenty,

Thank you very much!

P.S.  Second question, and I hope it doesn't sound too silly:

Does it make any difference when you hit the vacation button,  i.e. when it's your turn to move or your opponent's?

Oh my, important information to have.  Thanks.  Then I would make my move first and then put myself on vacation before my opponent responds?

Thanks to both of you!  Thought I was asking a silly question, but I guess not.

Yeah, just very helpful people!