With the options in template manager you can easily display a single background image.

If you want display a slideshow, I recommend you to install my free responsive slideshow and use the module position "image".

With my slideshow you can choose a specific height for desktop, tablets and / or phones. In this example, I choose :

  • for Desktop : Height = 80% of the viewport
  • for Tablets : Height = 440 pixels
  • for Phones : Heigth = 360 pixels

And to obtain the Content box always under the slideshow, go to the Template manager section "General" :

  • For the option "General Background image --> Content box under the background Image and in full width", choose "Always"
  • and for the next option "Height of background image for Desktop", choose 80% of the viewport.