Display PowerPoint Slide Show on 2nd monitor

I'm using laptop with a 19 inch HP monitor as 2nd display. I use the 2nd monitor mainly when I need a larger display or when I'm doing some demo to my colleagues. I just found that we can configure the PowerPoint to display the slide show on the 2nd monitor. By default it always display on the primary monitor. Below are the steps:
1. Menu -> Slide Show -> Set up Show...

2. In the "Set Up Show" windows, change the "Display Slide show on" setting in "Multiple monitors to "Monitor 2..."