Power Off / On button

[jrios]

Hello I have a machine with Mint 13 (Mate Edition) (sorry for my english).

I have installed xfce envoirment too, and I use Mate or Xfce in this machine.

In mate when I clic the power on / off button, immediatelly the machine power off. I like change this and I like confirm that I want to power off the machine. Basically I want to execute mate-session-save --shutdown-dialog and I can abort the shudown by error.

In Xfce when I clic power off runs well and to shutdown the computer I need to press shutdown button in dialog to power off the machine.

Do you know where I must change a shutdown script to when I clic power off button mate only execute the power off dialog (mate-session-save --shutdown-dialog) and do not powwer off immediatelly.

Thanks.