You can customize the header image of your job ad in the picture section. You can find it in the edit mode of your "Listenings" under the tab "Job ad". To customize it, press the pencil icon that appears as soon as you move your mouse over the corresponding section.
In this field you can upload up to three images, which will then be displayed as a slide show. Ideally, you should use photos in landscape format with an aspect ratio of 2.5 to 1, which corresponds to about 1140 x 456 pixels. Only images with a maximum size of 2 MB are allowed.
If you do not want to use the image section, you can remove it by clicking on "Delete".