Ok, I played around and I think this is what you're looking for:
Create a new object, when you do that, the main configuration panel will appear. Click on the button marked "change" next to Type of Object: Layer. Choose 'System' from the drop down list. Then choose 'Find' from the drop down list which appears below.
To do a restart button and a logoff button, follow the same procedure but choose 'restart' or 'logoff' from the bottom drop down list.
After you have done that, go to the 'States' tab to connect it to your graphic.
If that's not what you were looking for, let me know.