For the images on your FAIRLING profile we only use horizontal pictures. If the format you want to use is not working out, you could try it with a screenshot. That will allow you to change from upright to horizontal.
You can also put two portrait images next to each other and fuse them into one image to achieve the horizontal format.
Tip: The first image in your profile will be displayed in all previews (e.g. the Virtual Trade Fair and search results) and should be the most meaningful!
The perfect resolution is 1344px * 756px.