Adding the Background Slideshow
1: In the Global Template Styling parameters simply select the images you want in the background slideshow.
2: Toggle Load background slideshow to YES.
Fullscreen Display of Slideshow in Header
*This is a nice effect where you can have the fullscreen slider fill the header. It creates a nice landing page effect.
1: You have already created and enabled the slideshow above.
2: Now in the Header Block Styling Toggle the Fullscreen Header to YES.