Each setup can have at least one element that defines the output on export. The current output can be seen in the preview. For more information on the interface, click here.
To add an element press the plus sign next to the elements list. 
Available elements depend on the selected replacement type of your placeholder.
Replace with text or
Replace with image
Replace with QR-Code
- QR-Code (automatically selected, only one allowed)
No element available. Learn more here.