To place a Picture/Video in the background of a layout element, proceed as follows:

1. Select the layout in which you want to place a background picture/video.
   
2. In the Right Toolbar, in the Layout tab, go for Background and click the Pencil for Editing
3. You can either select a Colour or select an Image/Video by clicking the Pencil for Editing
   
4. Under Opacity you can set the opacity
5. For an image/video, you can change the Position at which the image/video should start
6. You can also specify whether the image/video is repeated horizontally or vertically
7. Under Offset you can move the image/video pixel by pixel from the starting point
8. Select Don‘t scroll background so that the background remains in the same position while scrolling
9. Under Filling you can specify how many pixels or percent the image/video should be wide or high. Deactivate the "Manual specification" function to place the image/video either completely or cropped.